Comparison of clinical outcomes between femtosecond laser-assisted cataract surgery versus conventional phacoemulsification in vitrectomized eyes - A prospective interventional study.

PURPOSE: To compare the clinical outcomes and surgical safety between femtosecond laser-assisted cataract surgery (FLACS) and conventional phacoemulsification cataract surgery (CPCS) in vitrectomized eyes. METHODS: A prospective interventional comparative study was conducted at a tertiary eye care center. Sixty consecutive cases requiring cataract surgery following pars plana vitrectomy were allocated into Group 1 (n = 30), who underwent FLACS with intraocular lens implantation, and Group 2 (n = 30), who underwent CPCS with intraocular lens implantation, and followed up for 3 months. Primary outcome measures were intraoperative ultrasonic cumulative dissipated energy (CDE) and intraoperative and postoperative complications. The secondary outcome measures were postoperative changes in endothelial cell count (ECC) and central corneal thickness (CCT). RESULTS: Baseline corrected distance visual acuity (CDVA), ECC, and CCT were comparable. Intraoperative CDE was significantly less in the FLACS group (8.11 vs. 15.83 percentage seconds; P = 0.012) with no intraoperative complication in either group. The postoperative CDVA was comparable between the groups with a trend toward earlier visual recovery in the FLACS group. The postoperative day (POD) 1 endothelial cell loss was higher in the CPCS group (7.54% vs. 2.05%), with the mean endothelial cell density being significantly higher in the FLACS group throughout the follow-up period (P < 0.05). POD-1 corneal edema was higher in the CPCS group compared to FLACS with no significant difference on follow-up. Intraoperative migration of silicone oil to the anterior chamber was observed in 40% versus 0% in the CPCS versus FLACS groups, respectively. CONCLUSION: FLACS can be safely performed in post-vitrectomy eyes with lesser intraoperative ultrasonic energy used, postoperative endothelial cell loss, and change in CCT compared to CPCS.

Effective cataract surgical coverage in India: Evidence from 31 districts.

BACKGROUND: Effective Cataract Surgical Coverage (eCSC) is a core outcomes domain indicator to assess accessibility and quality of eye care services with limited available information. PURPOSE: To generate baseline estimates of eCSC for India. METHODS: We performed the analysis of data pooled from Rapid Assessment of Avoidable Blindness surveys conducted in 31 districts of India during 2015-2019 among persons aged 50+ years. eCSC was calculated at various thresholds, the primary being operable cataract at best corrected visual acuity <6/12, good outcome at presenting visual acuity of 6/12. RESULTS: Age-sex standardized and weighed eCSC in India was 36.7% (95% CI: 33.6, 39.9), and cataract surgical coverage (CSC) was 57.3% (95% CI: 53.3, 61.2), a relative quality gap in cataract surgery being 36.0%. eCSC in males was higher at 38.0% than females (35.6%). eCSC increased with education from 31.0% in illiterate participants to 59.7% in class 10 educated. On multivariate analysis, rural setting, increasing age, and residence in eastern or northeastern zones of India continued to be associated with poor/worse eCSC, while female gender was associated with higher eCSC. District-wide variations in eCSC were observed. CONCLUSION: Developmental factors have an important bearing on eCSC in India. Geographical variations point toward the need for targeted, locally relevant strategies.

Management of acute corneal hydrops - Current perspectives.

Acute corneal hydrops (ACH) is a rare but sight-threatening complication of corneal ectasias. We aim to review the current literature on etiopathogenesis, histology, role of ancillary investigations, management, and outcomes of ACH by classifying the various management strategies based on their site of action and the underlying mechanism. A review of the literature was conducted by searching the following databases: PubMed (United States National Library of Medicine), Embase (Reed Elsevier Properties SA), Web of Science (Thomson Reuters), and Scopus (Elsevier BV) till April 2023. The literature search used various combinations of the following keywords: acute corneal hydrops, keratoconus, ectasia, management, keratoplasty. Nine hundred eighty-three articles were identified based on the above searches. Case reports which did not add any new modality of treatment to the existing literature, articles unrelated to management, those with no full text available, and foreign-language articles with no translation available were excluded. Eventually, 75 relevant articles that pertained to the management of ACH were shortlisted and reviewed. Recent studies have described newer surgical interventions like full-thickness or pre-Descemetic sutures, thermokeratoplasty, and plasma injection that aim to close the posterior stromal break. Posterior lamellar keratoplasties act by replacing the posterior torn Descemet's membrane (DM), and early deep anterior lamellar keratoplasty (DALK) has been attempted to combine the correction of the anatomical defect and visual rehabilitation in a single surgery. These surgical interventions may help by reducing the scarring and increasing the number of patients who can be visually rehabilitated with contact lenses rather than keratoplasty.

Comparative posterior corneal profile of keratoconus hydrops versus Haab's striae in congenital glaucoma.

Keratoconus eyes develop corneal decompensation more often compared to eyes with primary congenital glaucoma (PCG) following Descemet's membrane (DM) tear. This study was conducted to compare the posterior corneal morphology in areas with DM breaks with regards to DM and pre-Descemet's layer (PDL) between the two. In this cross-sectional comparative study, anterior segment optical coherence tomography (AS-OCT) scans of the posterior cornea of advanced keratoconus eyes with hydrops ( n = 12), PCG eyes with Haab's striae ( n = 15), and healthy control eyes ( n = 14) were compared for DM-PDL morphology. These were further corroborated by the histopathology of corneal buttons from keratoconus ( n = 14) and PCG ( n = 13) cases obtained following penetrating keratoplasty and compared with controls (enucleated retinoblastoma globes, n = 6) on light microscopy and collagen IV immunostaining. AS-OCT showed a thicker median DM/PDL complex in PCG (80 µm) versus keratoconus eyes (36 µm, P = 0.01; Kruskal-Wallis test). The median height and length of detached DM-PDL were significantly more in keratoconus versus PCG (145 µm, 1766.1 ± 1320.6 µm vs. 26.5 µm, 453.3 ± 303.2 µm, respectively, P = 0.012; Kruskal-Wallis test). Type-1 DM/PDL detachment (seen as a characteristic taut chord) in keratoconus (90%) was the most common morphological pattern versus intracameral twin protuberance (92%) following DM breaks in PCG. Histopathology confirmed thicker DM in PCG (median: 63.4 µm) versus keratoconus eyes (median: 33.2 µm) or controls (27.1 µm) ( P = 0.001; Kruskal-Wallis test). Greater height/length of DM/PDL detachment compounded by poor healing response (lower DM/PDL thickness) probably causes more frequent corneal decompensation in keratoconus eyes when compared to PCG eyes following DM tears.

Refractive surgery and dry eye - An update.

Dry eye disease is the most common complication and a frequent cause of patient dissatisfaction after corneal laser refractive surgery, which includes laser-assisted in situ keratomileusis (LASIK), small-incision lenticule extraction (SMILE), and photorefractive keratectomy (PRK). It has a complex, multifactorial etiology and is characterized by a highly variable clinical presentation. A detailed preoperative screening and optimization of the ocular surface prior to refractive surgery are the key to minimizing the incidence and severity of postoperative dry eye. Diagnosis of postrefractive surgery dry eye remains a challenge as no single symptom or clinical parameter is confirmative of the condition, and the symptoms and signs may not correlate well in many cases. A thorough understanding of the pathomechanism of the disease and its manifestations is essential to facilitate a treatment approach that is individualized for each patient. This article reviews various aspects of postrefractive surgery dry eye including its epidemiology, etiopathogenesis, risk factors, diagnosis, and management.

Cataract surgery in ocular surface disease.

Cataract surgery, which is the most widely performed ophthalmic procedure, is usually done in the elderly population, who are also prone to ocular surface disorders. Ocular surface diseases are multifactorial in nature and associated with symptoms and signs such as foreign body sensation, burning, fatigue, photophobia, red or watery eyes, or reduced visual acuity. These include a spectrum of conditions that may be immune or non-immune in nature. Cataract surgery in itself is known to alter the normal ocular surface milieu and cause tear film disturbances which can last up to 6 months post-operatively. These symptoms can be exaggerated in patients with ocular surface diseases. The planning and execution of cataract surgery can also be difficult in patients with associated ocular surface diseases. In this review, we discuss the various aspects of planning and intraoperative modifications to optimize the outcomes of cataract surgery in patients with ocular surface diseases.

Cataract surgery outcomes in pediatric patients with systemic comorbidities.

Purpose: The aim of the study was to evaluate the outcomes of cataract surgery in patients of the pediatric age group with systemic comorbidities. Methods: Medical records of 54 eyes (30 patients) of the pediatric age group with systemic comorbidities who had undergone cataract surgery in a tertiary-care center were reviewed. The following parameters were recorded: systemic comorbidity; toxoplasmosis, rubella, cytomegalovirus, herpes simplex, HIV (TORCH) profile, best spectacle-corrected visual acuity (BSCVA), strabismus, nystagmus, and cataract morphology. Results: Thirty patients with a mean age of 55 months (9 months-14 years) were included. On average, every child was seen by three physicians, and the mean duration between the first visit to a physician and presentation to our center was 2.23 ± 0.67 years. The various causes for delay in referral include multiple referrals due to a lack of general anesthesia services in 78% of cases, a long waiting list at the referral hospital in 35% of cases, and a lack of awareness at the primary-care physician level in 50% of cases. The mean BSCVA at presentation was 1.4 logMAR (0.3 to 3 logMAR). The most common cataract morphology was that of zonular cataract (31.48%; 17/54). Strabismus and abnormal eye movements were observed in 27.7% (15/54) and 33.3% (18/54) of eyes, respectively. Various systemic associations were periventricular leukomalacia (12/30), Down's syndrome (6/30), seizure disorder (6/30), cardiac valvular anomalies (6/30), Marfan's syndrome (4/30), hypothyroidism (4/30), rubella (3/20), cytomegalovirus (3/20), cerebral palsy (2/30), nephrotic syndrome (2/30), Type 1 diabetes mellitus (1/30), microcephaly (1/30), cryptogenic West syndrome (1/30), congenital rubella syndrome (1/30), and Tourette syndrome (1/30). The mean postoperative corrected distance visual acuity (CDVA) at 2-year follow-up improved to 1.0 logMAR (0 to 3 logMAR). No postoperative complications were reported at the final follow-up. Around 70% of the parents reported improvement in their child's psychomotor skills. Conclusion: Intellectually impaired pediatric patients with cataract should be operated upon whenever there is a presence of infrastructure, and unnecessary delay in surgery should be avoided by referring the patient to higher centers. Even though objective improvement in visual acuity was suboptimal, there was definitely an improvement in the psychomotor skills of the patients.

Twelve-Months Follow-Up Postmarket Study of a Hydrophobic Intraocular Lens Using a Preloaded Automated Injector in an Indian Population.

Purpose: To assess real-world clinical outcomes and safety of the Clareon® intraocular lens (IOL) and AutonoMe® automated preloaded delivery system in an Indian population. Patients and methods: This was a prospective, single-arm, multicenter, 12-month clinical study in patients aged ≥20 years with unilateral or bilateral cataracts. Surgery was performed by phacoemulsification followed by implantation of the Clareon monofocal IOL (CNA0T0). Monocular best-corrected distance visual acuity (BCDVA) and uncorrected distance visual acuity (UCDVA) were assessed at 1 week and 1, 6, and 12 months after implantation. Posterior capsular opacification (PCO), surface haze, and glistenings were evaluated at all visits. Surgeons' satisfaction with automated injector system was also evaluated using a questionnaire. Safety was assessed by monitoring adverse events (AEs). Results: A total of 151 eyes received the CNA0T0 IOL. Mean ± SD monocular BCDVA improved from 0.53±0.44 logMAR preoperatively to 0.00±0.08 logMAR at week 1 and -0.03±0.08 logMAR at 12 months after implantation. At 12 months, 137/137 (100%) of eyes achieved BCDVA of 0.3 logMAR or better. Mean ± SD monocular UCDVA was 0.78±0.40 logMAR preoperatively, 0.11±0.15 logMAR at week 1, and 0.08±0.13 logMAR at 12 months after implantation. At 12 months, 132/137 (96%) eyes achieved UCDVA of 0.3 logMAR or better. Serious intraoperative AEs were posterior capsule rupture (n=1) and ciliary zonular dehiscence (n=1). Surgeons reported that the automated preloaded device was more intuitive compared with other push- or screw-style preloaded injector systems. None of the eyes in this study presented surface haze; all were graded as 0 glistenings at all visits. No clinically significant PCO or neodymium-doped yttrium aluminum garnet (Nd:YAG) capsulotomies were reported. Conclusion: The hydrophobic IOL preloaded in an automated injector system provided good visual and refractive outcomes, as well as no surface haze and grade 0 glistenings. None of the patients required Nd:YAG capsulotomy.

Gonioscopy and Angle-Based Glaucoma Surgical Training on Human Eyes in the Wet Lab.

PRCIS: Human corneoscleral rims provide a low cost model and resource to enhance angle based glaucoma surgical training skills. PURPOSE: To understand the feasibility, utility, and efficacy of a low-cost model for performing anterior chamber angle gonioscopy and micro-surgery on human corneoscleral tissues in wet lab on resident skill enhancement. METHODS: Post-keratoplasty residual corneoscleral rims and/or the expired donor corneoscleral buttons were included for the purpose of this study. Initially, inverted rims were used to demonstrate the basic angle anatomy on a slit lamp bio-microscope. Central hazy cornea was then replaced with an artificial cornea and an artificial anterior chamber to simulate indirect gonioscopy, direct gonioscopy, goniotomy, and other angle-based surgeries. Direct gonioscopy and goniotomy exercises (as a means to simulate intraoperative gonioscopy and other angle-based surgeries respectively) were evaluated quantitatively, and the rest qualitatively. RESULTS: A total of 65 residents were included in the exercise. The mean age was 26.69±1.74 years. Amongst these, 55 ophthalmology residents performed the basic examination, that is, slit lamp mounted angle anatomy examination (n=55) and artificial chamber mounted indirect gonioscopic examination through artificial cornea (n=55). In the second exercise, 10 glaucoma fellows performed the direct gonioscopic and the goniotomy exercises on artificial chamber. The fellows demonstrated a statistically significant improvement in interpretation and surgical skill enhancement concurrent with reduction in time taken with increasing number of attempts ( P <0.05). In the third simulation exercise, micro-stent placement within the Schlemm's canal, subconjunctival space, and the suprachoroidal space was re-produced successfully on multiple occasions. CONCLUSIONS: The residual human corneoscleral rims proved to be an important resource for teaching both the basic examination skills and those required for transitioning to advanced intraoperative gonioscopy and goniotomy skills. These low cost, easy to adapt models can be incorporated within the curriculum for improved glaucoma training of both the residents and the glaucoma fellows.

Outcomes of surgical intervention in cases of ectopia lentis.

Purpose: To evaluate the outcomes of surgical intervention in cases of ectopia lentis. Methods: This retrospective study included all cases of ectopia lentis that presented between June 2015 and March 2019 in a tertiary care center. They were reviewed retrospectively. The corrected distance visual acuity (CDVA), severity of lens subluxation, type of surgery, intra-operative and post-operative complication, and specular count were recorded. Results: Seventy-eight eyes of 57 cases with a mean age at surgery of 14.73 years were analyzed. Intra-lenticular lens aspiration was the most common (n-62/78; 79.5%) surgical procedure followed by lens aspiration, intra-capsular cataract extraction, phaco-aspiration, and pars-plana lensectomy. Simultaneous intra-ocular lens (IOL) implantation was performed in 46.2% (n-32/78) of the eyes. The mean CDVA improved from 0.85 ± 0.55 logMAR to 0.44 ± 0.29 logMAR at 6 weeks follow-up. The post-operative CDVA was significantly better in the pseudo-phakic group compared to the aphakic group (p-0.02). The patient's age at the time of surgery and the degree of subluxation did not impact the final visual outcome. Intra-operative complication included vitreous hemorrhage (n-1) and lens matter drop (n-1). Post-operative complications were noted in 26.9% of the eyes (n-21/78) with a higher complication rate in the pseudo-phakic group (p-0.00). A second intervention was required in 7.7% of the eyes (n-6/78). Conclusion: Age and degree of subluxation at the time of surgery do not influence the final visual outcome in cases of ectopia lentis undergoing lens extraction surgery. IOL implantation results in better visual outcomes but is associated with a high complication rate.

Volcano explosion in the eye: Expulsive choroidal haemorrhage.

BACKGROUND: This video shows the dreaded complication of expulsive suprachoroidal haemorrhage in a penetrating keratoplasty . It teaches the various measures that help in preventing and managing the challenge peri-operatively. PURPOSE: This video is intended to sensitize the corneal surgeons about this rare complication using real-time surgical video and prepare them to face this challenge by demonstrating the preventive and mitigating strategies. SYNOPSIS: A patient who was suitably taken up for an autokeratoplasty had expulsive choroidal haemorrhage in the non-seeing eye. This complication was managed using glycerin-preserved donor corneal button. Further, the video discusses various pre-operative and intra-operative optimizations to avoid such a complication and mitigate the damage caused by it, should it ever happen during a surgery. HIGHLIGHTS: Expulsive choroidal haemorrhage can be a traumatizing event and one must be mentally prepared to manage it. Pre-operative high-risk factors should always be managed and intra-operative maneuvers performed to prevent the complication, as shown in the video. VIDEO LINK: https://youtu.be/s_ImBugPELw.

Animal and cadaver human eyes for residents' surgical training in ophthalmology.

In ophthalmology residency programs surgical training plays a vital role in creating confident and skillful surgeons. As almost all ophthalmic surgery needs microscope training, creating a well-taught environment for hand-eye coordination, ocular tissue handling, and anticipation of complications is essential. Wet lab training with animal or cadaver human eyes offers diverse possibilities. We conducted a thorough literature search on various databases to identify the existing literature on wet labs. The results revealed constructive efforts for training novice surgeons in all surgical ophthalmology subspecialties. Wet lab models were initially used only to practice cataract surgery; however, now various complex ocular procedures can be practiced. Ocular surface, corneal, iris, lenticular, scleral, vitreoretinal, extraocular, eyelid, and other adnexal surgeries were reproduced and mastered in many ways. Importantly, with repeated surgical practice, residents gained an increasing level of confidence with enhanced surgical accuracy. In addition, we propose a few novel techniques of various other procedures.

Long-term Outcomes of Fibrin Glue-Assisted Intrascleral Haptic Fixation of Posterior Chamber Intraocular Lenses in Children.

OBJECTIVES: To evaluate the long-term outcomes of intrascleral haptic fixation of posterior chamber intraocular lens (PCIOL) with fibrin glue in children. METHODS: This is a retrospective case study conducted in a tertiary eye institute in North India. A total of 118 eyes of 82 children who underwent glued intrascleral haptic fixation of PCIOLs were retrospectively analyzed. Detailed analysis of the indication for surgery and ocular and systemic associations was performed. The outcome measures included intraoperative complications, final visual and refractive outcomes, and postoperative complications. RESULTS: The mean age of the patients was 10.16±3.94 years. Fifty-one patients (62.2%) were male and 31 (37.8%) were female. The mean follow-up period was 31.28±13.22 months. The mean preoperative corrected distance visual acuity was 1.18±0.63 Logarithm of Mean angle of resolution (logMAR) which improved to 0.60±0.58 logMAR postoperatively at 6 weeks (P<0.001). The mean preoperative and 6 weeks postoperative endothelial cell density were 3,176.08±318.6 and 2,936±289.9 cells/mm2, respectively (P=0.23). In the immediate postoperative period, corneal edema (19 eyes; 16.1%), decentered IOL/tilt (3 eyes; 2.54%), vitreous hemorrhage (3 eyes; 2.54%), optic capture (4 eyes; 3.38%), and hypotony (2 eyes; 1.69%) were seen. In the late postoperative period (>6 weeks), retinal detachment was observed in two eyes that had associated Marfan syndrome. Cystoid macular edema was seen in four eyes (3.38%), and glaucoma was seen in five eyes (4.23%). CONCLUSIONS: Fibrin glue-assisted intrascleral haptic fixation of a PCIOL is a safe and effective method to manage aphakia with inadequate capsular support in children.

Simulation of complex strabismus surgical procedures on goat eyes.

PURPOSE: To describe the possibility of complex strabismus surgical simulation on goat eyes. METHODS: The goat eyes were procured from local slaughterhouse with retained extra ocular muscle tissues. The obtained eyes were inspected for globe integrity, muscle quality, muscle length, and the surrounding teno-conjunctival layers. The included eyes were then segregated for surgical simulation based on their insertion and orientation (as oblique or recti), and they were mounted on a mannequin head, with a fixation suture at free end to simulate the resting tension. Additionally, as per necessary, extra muscles were also transplanted along desired sites to simulate human extra ocular muscle anatomy. RESULTS: The inferior oblique, superior oblique, and all other four recti were successfully simulated in varying proportions in more than 50 eyes. Primarily, by simulating the lateral rectus, inferior rectus, and the inferior oblique muscle, staged weakening procedures of inferior oblique were successfully practiced (Fink's recession, Park's recession, Elliot and Nankin procedure, total anterior positioning, and antero-nasal trans-position or Stager's procedure). Similarly, by simulating superior rectus, inferior rectus, lateral rectus, and the medial rectus muscles, half width transposition, full width transposition, and other complex procedures were practiced (Knapp's procedure, augmented Knapp's, Nishida's procedure, Faden operation, and Y splitting procedure). Furthermore, by simulating superior oblique and the superior rectus muscles, superior oblique tuck, posterior tenectomy, loop tenotomy, and Harada Ito procedures were successfully practiced. CONCLUSIONS: On goat eyes, the complex strabismus surgical procedures can be successfully simulated and practiced after re-organizing the existing muscles in different patterns.

Intraoperative optical coherence tomography-guided management of post-laser-assisted in situ keratomileusis epithelial ingrowth.

We describe a modified technique of intraoperative optical coherence tomography (iOCT)-guided removal of post-laser-assisted in situ keratomileusis (LASIK) epithelial ingrowth with interface ethyl alcohol and mitomycin C application to prevent a recurrence. Epithelial ingrowth was visualized as hyperreflective deposits in the interface on iOCT, and the location and extent were noted at the beginning of the procedure. A simple dimple-down maneuver was performed to help identify the circumference of the LASIK flap. iOCT helped to delineate the flap edge and ensure dissection in the correct plane with complete removal of epithelial cell nests. Real-time visualization of the interface helped in on-table decision making regarding the extent of lifting the flap to encompass the entire region of hyperreflective epithelial ingrowth, as well as the need for additional interventions to ensure complete flap apposition at the end of surgery. All patients gained an uncorrected visual acuity of 20/20-20/25 with no recurrence.

Comparative evaluation of once-daily and twice-daily dosing of topical bromfenac 0.09%: aqueous pharmacokinetics and clinical efficacy study.

PURPOSE: To evaluate aqueous pharmacokinetics of topical bromfenac 0.09% and compare clinical outcomes of once- and twice-daily dosing in phacoemulsification. SETTING: Dr. R.P. Center for Ophthalmic Sciences, AIIMS, New Delhi, India. DESIGN: Prospective interventional study. METHODS: In phase I, single-drop aqueous pharmacokinetics of topical bromfenac was estimated at 15 minutes, 30 minutes, 1 hour, 2 hours, 4 hours, 12 hours, and 24 hours using liquid chromatography mass spectrometry in 60 eyes. In phase II, 45 eyes undergoing phacoemulsification were enrolled: group I (control, n = 15), group II (once-daily bromfenac, n = 14), and group III (twice-daily bromfenac, n = 16). Intraoperative pupillary miosis, postoperative anterior chamber (AC) flare, Summed Ocular Inflammation Score (SOIS), central macular thickness (CMT), and pain scores were assessed. Follow-up was performed at 1 day, 7 days, 28 days, and 90 days postoperatively. RESULTS: Half-life of topical bromfenac was 3.6 hours, mean residence time 5.5 hours, and peak concentration (63.73 ng/mL) achieved after 2 hours. Aqueous concentration was more than inhibitory concentration (IC50) at 12 hours but not at 24 hours. Cumulative effect was observed with repeated dosing with aqueous levels more than IC50 in once-daily and twice-daily groups at 5 days. Significant intraoperative miosis was observed in group I. Pain score, AC flare, and SOIS were significantly more in group I (P < .001) and comparable in groups II and III at all timepoints. CMT was comparable in all groups; no case developed cystoid macular edema. CONCLUSIONS: Single-dose topical bromfenac did not maintain therapeutic aqueous concentration over 24 hours; however, cumulative effect was observed with repeated dosing. Clinical efficacy of once-daily and twice-daily dosing was comparable.

Microscope Integrated Optical Coherence Tomography Guided Descemet Stripping Automated Endothelial Keratoplasty in Congenital Hereditary Endothelial Dystrophy.

PURPOSE: To describe the outcomes of descemet stripping automated endothelial keratoplasty (DSAEK) in congenital hereditary endothelial dystrophy (CHED) and to evaluate the role of microscope integrated optical coherence tomography (Mi-OCT) during the surgery. DESIGN: Retrospective data analysis. METHODS: A retrospective study from the medical records of all those patients who were diagnosed with CHED and underwent DSAEK at our centre from 2015 were evaluated. All patients underwent Mi-OCT-guided standard DSAEK procedure. Intra-operative difficulties, visual outcomes and graft survival were recorded. RESULTS: A total of 48 eyes of 29 patients with a mean age of 9.87 ± 8.2 years and mean follow-up of 17.3 months were evaluated. Thirty-nine eyes underwent primary DSAEK and 9 eyes underwent PKP. Three eyes who underwent PKP had failed graft for which they underwent DSAEK. The mean preoperative Snellen's visual acuity was 1.71 ± 0.66 and the mean preoperative central corneal thickness was 1.10 ± 0.174 mm. Intraoperatively, all the grafts were attached which was confirmed using Mi-OCT. Graft detachment was seen in the immediate postoperative period in 10.4% (4 eyes) of primary DSAEK, out of which DM scoring was not performed in 2 eyes. Following DSAEK, cornea cleared at four-week follow-up in 89.7% eyes and in all the eyes the cornea cleared at six-week follow-up. CONCLUSION: Primary DSAEK could be a preferred option over PKP for CHED with early presentation and in those eyes with failed primary PKP. Mi-OCT is a very useful tool in these eyes for various intraoperative procedures, thereby improving the outcomes of the procedure.

Assessment of posture-induced cyclotorsion during cataract surgery using the Verion image-guided system.

BACKGROUND: The purpose of this prospective observational study is to analyse posture-induced cyclotorsion in eyes undergoing conventional phacoemulsification with toric intraocular lens (IOL) implantation and femtolaser-assisted cataract surgery (FLACS) using the Verion image-guided system. METHODS: Cyclotorsion was assessed in patients who underwent conventional phacoemulsification with toric IOL implantation and FLACS between June 2017 and November 2017 with registration of iris architecture, limbal and bulbar conjunctival blood vessels acquired preoperatively using the Verion Reference Unit (the patient in sitting position) and intraoperatively under the microscope using the digital marker of the Verion image-guided system with the patient in supine position. RESULTS: Forty-four eyes of 30 patients (21 men and 9 women) were included with the mean age of 56.5 ± 17.1 (range, 19-89; median, 62) years. The mean cyclotorsion induced by change in posture from sitting to supine position was 5.84 ± 3.25° (range, 1-17; median, 5). Overall, clockwise (CW) rotation (59.1%) was noted to be more common than counter clockwise (CCW) rotation (40.9%). Furthermore, CW rotation was more common in men than in women, and CCW rotation was significantly more common in women. Patients who underwent bilateral sequential cataract surgery show similar cyclorotation (CW or CCW) in both eyes more often than mixed rotation (85.7% vs 14.3%). CONCLUSION: Significant cyclotorsion can occur in supine position during cataract surgery. Accurate assessment of the amount and direction of cyclotorsion aids in appropriate alignment of the toric IOL for optimal visual outcomes.