Iris Cerclage To Treat Persistent Mydriasis Following Acute Angle Closure Glaucoma Improves Visual Quality.

PRCIS: We developed a modified iris cerclage technique that improves best corrected visual acuity, pupillary parameters, self-assessed photophobia, and visual function index-14 questionnaire scores in patients with acute primary angle closure and permanent mydriasis after cataract surgery. PURPOSE: To evaluate the efficacy of a modified iris cerclage technique in patients with acute primary angle closure (PAC) and permanent mydriasis after cataract surgery. PATIENTS AND METHODS: Twelve eyes of 12 patients with acute PAC and permanent mydriasis at more than 3 months after phacoemulsification combined with intraocular lens (IOL) implantation underwent modified iris cerclage. Best corrected visual acuity (BCVA), intraocular pressure (IOP), pupil diameter, and visual function index-14 (VF-14) questionnaire and self-assessed photophobia scores before surgery and at 1 week, 1 month, and 3 months postoperatively were compared. Further, the postoperative pupil position morphology and complications were evaluated. RESULTS: BCVA improved from 0.48±0.23 preoperatively to 0.28±0.15, 0.27±0.15, and 0.26±0.14 at 1 week, 1 month, and 3 months postoperatively, respectively ( P =0.008). No significant difference was observed between the preoperative and postoperative IOP ( P =0.974). Pupil diameter improved from 6.34±0.51 mm preoperatively to 3.59±0.33, 3.59±0.34, and 3.58±0.32 mm at 1 week, 1 month, and 3 months postoperatively, respectively ( P <0.001). Self-assessed photophobia scores improved from 3.33±0.78 preoperatively to 0.83±0.72, 0.51±0.15, and 0.45±0.14 at 1 week, 1 month, and 3 months postoperatively, respectively ( P <0.001). VF-14 scores improved from 47.6±6.1 points preoperatively to 67.9±6.2, 72.1±6.1, and 73.5±6.0 points at 1 week, 1 month, and 3 months postoperatively, respectively ( P< 0.001). Postoperatively, all pupils were centered and round. No postoperative complications, such as iris-suture slippage, iridodialysis, or exposure of the IOL's optical zone edge, were observed. CONCLUSION: Modified iris cerclage creates a centered, precisely sized, round pupil. It improves visual quality in patients with acute PAC and permanent mydriasis after cataract surgery.

Pupil cerclage technique for treatment of traumatic mydriasis.

AIM: The aim of this study is to evaluate the efficacy of pupil cerclage and a new variant of sliding knot technique for repairing traumatic mydriasis. DESIGN: This is a observational case series study. SETTING/METHODS: A series of consecutive patients affected by traumatic permanent mydriasis who underwent pupil cerclage were recruited at the Department of Ophthalmology of the University of Padova, Italy. Best-corrected visual acuity, measured in logarithm of minimum angle of resolution (logMAR), and intraocular pressure at 1, 3, 6, and 12 months were monitored. Postoperative pupil size and anterior chamber angle were measured. Postoperative cystoid macular edema (CME) and glaucoma were evaluated. RESULTS: Twelve patients were recruited. Phakic patients (7) underwent cataract surgery combined with pupil cerclage. Vitrectomy was performed in nine patients. Best-corrected visual acuity improved from 2.9 ± 1.1 logMAR at baseline to 0.3 ± 0.8 logMAR at 12th month. No significant difference between the preoperative and postoperative intraocular pressure was demonstrated. Mean pupil size at 12th month was 2.82 ± 0.5 mm with round shape. Anterior chamber angle mean was 47° ± 4.5°. Six patients developed a CME, and two patients a glaucoma. CONCLUSION: Pupil cerclage technique reestablishes the pupil with a precise regulation of the pupil size without distortion of its natural round shape. New sliding knot allows surgeon to reduce the risk of iatrogenic iris damage and to make a security permanent knot.

The effect of mydriasis on moderate-to-high myopic eyes with implantable collamer lenses V4 and V4c.

PURPOSE: To evaluate the vault change and anterior segment movement induced by mydriasis in moderate-to-high myopic eyes with implantable collamer lenses (ICL). SETTING: Shanghai, China. DESIGN: A prospective consecutive observational study. METHODS: A total of 45 eyes of 24 patients with ICL V4 implantation and 128 eyes of 65 patients with ICL V4c implantation were included and analyzed. Anterior chamber depth, posterior corneal endothelium-to-ICL distance, and vault before and after mydriasis were measured by Pentacam (Oculus, Wetzlar, Germany) at 1, 3, and 6 months after surgery. RESULTS: Significant vault increases and anterior chamber depth increases induced by mydriasis were noted in both ICL V4 and V4c groups at 1, 3, and 6 months postoperatively. The corneal endothelium-ICL distance increased significantly in eyes with implanted ICL V4c after mydriasis at 3 and 6 months. Moreover, mydriasis-induced vault increases were greater in the ICL V4 group than in the ICL V4c group at 3 and 6 months. In eyes with implanted ICL V4c, mydriasis-induced vault increases were significantly greater at 1 month than at 3 and 6 months. CONCLUSION: Mydriasis results in a general vault increase in eyes with implanted ICLs. The adjustment of the pressure equilibrium via the central hole of the ICL V4c has an important role in vault change. The mydriasis-induced vault increases tend toward stability after 3 months postoperatively. Mydriasis is relatively safe in eyes with ICL implantation.

Pupil-Involving Oculomotor Nerve Palsy Following Tonsillectomy and Adenoidectomy.

Ocular complications of adenotonsillectomy are rare. The authors describe a 6-year-old boy who developed mydrasis and limitations of supraduction and infraduction after adenotonsillectomy. This was attributed to the hemorrhagic compression of the nerve in the cavernous sinus. This is the first report of pupil-involving oculomotor nerve palsy following adenotonsillectomy. [J Pediatr Ophthalmol Strabismus. 2019;56:e76-e78.].

Ipsilateral transient amaurosis, mydriasis and light reflex absence after subconjunctival local anesthesia with mepivacaine in three patients with refractory glaucoma - a case report.

BACKGROUND: The subconjunctival anesthesia with local anesthetics is considered as a low-risk procedure allowing ocular surgery without serious complications typical for retro- or parabulbar anesthesia, especially in patients with preexisting Optic Nerve damage. We report development of ipsilateral transient amaurosis accompanied with mydriasis and both, direct and consensual light response absence. CASE PRESENTATION: Three patients with advanced refractory glaucoma undergoing laser cyclophotocoagulation (CPC) for intraocular pressure lowering experienced these adverse effects just few minutes after subconjunctival injection of mepivacaine 2% solution (Scandicaine® 2%, without vasoconstrictor supplementation). The vision was completely recovered to usual values in up to 20 h after mepivacaine application. Extensive ophthalmological examination, including cranial magnetic resonance imaging (MRI), revealed no further ocular abnormalities, especially no vascular constriction or thrombotic signs as well as no retinal detachment. The oculomotor function remained intact. The blockade of ipsilateral ciliary ganglion parasympathetic fibers by mepivacaine may be the responsible mechanism. Systemic pathways as drug-drug interactions seem to be unlikely involved. Importantly, all three patients tolerated the same procedure previously or at a later date without any complication. Overall, our thoroughly elaborated risk management could not determine the causative factor explaining the observed ocular complications just in the current occasion and not at other time points. CONCLUSIONS: Doctors should be aware and patients should be informed about such rare complications after subconjunctival local anesthetics administration. Adequate risk management should insure patients' safety.

Ocular abnormalities in patients treated with a novel anti-GD2 monoclonal antibody, hu14.18K322A.

PURPOSE: To determine the incidence of and factors associated with the development of mydriasis and impaired accommodation in patients with refractory or recurrent neuroblastoma receiving the anti-GD2 antibody hu14.18K322A. METHODS: The medical records of eligible patients with refractory or recurrent neuroblastoma who received escalating doses of hu14.18K322A, ranging from 2 to 70 mg/m(2)/dose for 4 consecutive days every 28 days, were retrospectively reviewed to identify ocular abnormalities arising during the treatment period. RESULTS: A total of 38 patients (median age, 7 years; 23 males) were included. All patients underwent comprehensive eye examinations prior to each course of therapy. Mydriasis was seen in 13 patients (34%), and impaired accommodation was seen in 9 (24%), indicating a dose-related effect between hu14.18K322A and both mydriasis (P = 0.021) and impaired accommodation (P = 0.029). Age and sex were not associated with ocular abnormalities. Ocular symptoms resolved in the majority of patients after the drug was discontinued. CONCLUSIONS: Side effects of mydriasis and impaired accommodation have a dose-dependent relationship with hu14.18K322A. These side effects do not warrant discontinuation of treatment, as they usually resolve after completion of therapy. Management of ocular side effects should focus on treating symptoms with manifest refraction, bifocals, or tinted spectacles.

Digital pupillometry and centroid shift changes after cataract surgery.

PURPOSE: To compare postoperative changes in apparent photopic and mesopic pupil size and centration in relation to cornea reflection landmarks after cataract surgery. SETTING: LaserVision.gr Clinical and Research Eye Institute, Athens, Greece. DESIGN: Prospective consecutive case study. METHODS: Pupils were imaged for pupil size and corneal vertex location before and 1-month after cataract surgery. Digital analysis of pupil images was used to determine the Cartesian coordinates (nasal-temporal, horizontal axis, superior-inferior, vertical axis) of the first Purkinje reflection point (approximating the corneal intersection of the visual axis [corneal vertex]) to the pupil geometric center (approximating the corneal intersection of the line of sight [corneal apex]). Pupil size changes were measured, and the correlation between vertex-to-apex shift changes and postoperative pupil centroid shift was evaluated. RESULTS: The study evaluated 40 eyes. The pupil size (diameter) change corresponded to a relative reduction of -9.8% for photopic pupils and -9.1% for mesopic pupils; the difference was statistically significant (P = .045 and P = .011, respectively). Also, there was a reduction in the centroid shift (all eyes) from a mean of 0.12 mm preoperatively to 0.05 mm postoperatively as a result of the postoperative minus temporal horizontal difference between the corneal vertex and the apex. CONCLUSIONS: Cataract extraction surgery appears to affect pupil size and centration. Specifically, a smaller pupil and less temporal shift were recorded. These data may have clinical relevance in targeted intraoperative intraocular lens centration. FINANCIAL DISCLOSURE: Dr. Kanellopoulos is a consultant to Alcon Surgical, Inc., Wavelight Laser Technologie AG, Allergan, Avedro, Inc., and i-Optics Corp. No author has a financial or proprietary interest in any material or method mentioned.

Measurement of pupil center shift in refractive surgery candidates with caucasian eyes using infrared pupillometry.

PURPOSE: To evaluate the effectiveness of the pupil center shift with changes in the state of pupil size and with other ocular variables. METHODS: Dynamic pupillometry with the Topolyzer Vario (Alcon Laboratories, Inc., Fort Worth, TX) was performed in 248 eyes of 124 patients scheduled for corneal laser refractive surgery. High-resolution images were obtained using the infrared-sensitive camera (incorporated in the videokeratoscope) under mesopic and photopic conditions. Measurements of pupil diameters, distance between the pupil center and keratoscopic axis, and spatial shift of the pupil center were obtained after analysis. RESULTS: The mean distance between the pupil center and the corneal vertex in mesopic and photopic conditions of illumination in myopic eyes was 0.27 ± 0.14 (range: 0.02 to 0.70 mm) and 0.24 ± 0.12 mm (range: 0.06 to 0.65 mm), respectively, whereas it was 0.36 ± 0.15 (range: 0.03 to 0.70 mm) and 0.31 ± 0.16 mm (range: 0.03 to 0.77 mm) in hyperopic eyes, respectively. The mean spatial pupil center shift was significant: 0.11 ± 0.07 mm (range: 0.02 to 0.57 mm) in myopic eyes and 0.12 ± 0.09 mm (range: 0.02 to 0.47 mm) in hyperopic eyes. The pupil center shifted consistently temporally as the pupil dilated. The pupil center shift was not significantly related to sex, age, eye (right or left), or refractive error. CONCLUSIONS: The mean distance between the pupil center and the corneal vertex is greater in hyperopic eyes than in myopic eyes, whereas the spatial shift of this pupil center has a temporal direction as the pupil dilates and is constantly small in all groups. However, pupil center shift can be important in a few patients.

Urrets-Zavalia syndrome (fixed and dilated pupil following penetrating keratoplasty for keratoconus) and its variants.

Urrets-Zavalia Syndrome (UZS) was described 50 years ago as the appearance of a fixed and dilated pupil following penetrating keratoplasty for keratoconus in patients receiving atropine. The mechanism of UZS has still not been fully determined, but an acute increase in intraocular pressure and ischemia of the iris most probably play a major role. Fixed and dilated pupils also occur in association with other ophthalmic surgeries, such as lamellar keratoplasties, cataract surgery, and glaucoma procedures. Some have questioned the existence of this syndrome, as well as the linkage to keratoconus and use of mydriatics. We review the pathophysiology, etiology, and clinical presentation of fixed and dilated pupils following ophthalmic procedures.

Effects of MDMA alone and after pretreatment with reboxetine, duloxetine, clonidine, carvedilol, and doxazosin on pupillary light reflex.

RATIONALE: Pupillometry can be used to characterize autonomic drug effects. OBJECTIVE: This study was conducted to determine the autonomic effects of 3,4-methylenedioxymethamphetamine (MDMA, ecstasy), administered alone and after pretreatment with reboxetine, duloxetine, clonidine, carvedilol, and doxazosin, on pupillary function. METHODS: Infrared pupillometry was performed in five placebo-controlled randomized studies. Each study included 16 healthy subjects (eight men, eight women) who received placebo-MDMA (125 mg), placebo-placebo, pretreatment-placebo, or pretreatment-MDMA using a crossover design. RESULTS: MDMA produced mydriasis, prolonged the latency, reduced the response to light, and shortened the recovery time. The impaired reflex response was associated with subjective, cardiostimulant, and hyperthermic drug effects and returned to normal within 6 h after MDMA administration when plasma MDMA levels were still high. Mydriasis was associated with changes in plasma MDMA concentration over time and longer-lasting. Both reboxetine and duloxetine interacted with the effects of MDMA on pupillary function. Clonidine did not significantly reduce the mydriatic effects of MDMA, although it produced miosis when administered alone. Carvedilol and doxazosin did not alter the effects of MDMA on pupillary function. CONCLUSIONS: The MDMA-induced prolongation of the latency to and reduction of light-induced miosis indicate indirect central parasympathetic inhibition, and the faster recovery time reflects an increased sympathomimetic action. Both norepinephrine and serotonin mediate the effects of MDMA on pupillary function. Although mydriasis is lasting and mirrors the plasma concentration-time curve of MDMA, the impairment in the reaction to light is associated with the subjective and other autonomic effects of MDMA and exhibits acute tolerance.

Síndrome disautonómico de Ross: variaciones de un tema / Disautonomic Ross syndrome: variations about one theme

El síndrome de Ross fue descrito en 1958 como una afección degenerativa del sistema nervioso autónomo definido por la tríada de anhidrosis generalizada, disminución de los reflejos tendinosos y pupila tónica. Desde su descripción inicial se han descrito cerca de cuarenta casos. Comunicamos tres pacientes con variantes de interés que incluyen la presencia de espasmos cíclicos espontáneos del esfínter de iris, el desarrollo conjunto de síndrome de Holmes-Adie en un lado y síndrome Horner posganglionar en el otro, trastornos del desarrollo piloso en el lado de la anhidrosis, alteraciones de la motilidad intestinal, lengua sin papilas gustativas y disfunción sexual.

Ross Syndrome was described in 1958 as a degenerative condition of the autonomic nervous system defined by a triad of generalized anhidrosis, reduction of tendon reflexes and tonic pupil. Since its initial description about 40 cases have been described. We communicate three cases with variants of interest involving the presence of the simultaneous development of syndrome of Holmes-Adie on one side and Horner syndrome in the other, disorders of pilous follicle development on the side of anhidrosis, spontaneous disturbances of intestinal motility, tonque without papillae and sexual dysfunction.

Case report: unilateral mydriasis following nasal cautery.

We report a case of unilateral mydriasis following nasal electrocautery presumed to be the result of retrograde flow of adrenaline and/or xylometazoline hydrochloride (Otrivine) through the nasolacrimal duct into the eye. We review the literature and highlight the importance of correct interpretation of finding a dilated pupil post-operatively. To our knowledge. we report the first such case involving xylometazoline hydrochloride and also following nasal electrocautery. Unilateral mydriasis is alarming after nasal surgery but must be interpreted with caution. During minimally invasive procedures it is likely to be due to the effects of topical medication to the nose rather than surgical trauma.

Arachnoid cyst causing third cranial nerve palsy manifesting as isolated internal ophthalmoplegia and iris cholinergic supersensitivity.

An 8-month-old boy presented with anisocoria, a sluggishly reactive right pupil, and cholinergic supersensitivity as the only signs of what proved months later to be compressive third cranial nerve palsy due to an arachnoid cyst. Tonic constriction and dilation, segmental iris sphincter palsy, aberrant regeneration phenomena, ductional deficits, and ptosis were absent. The initial diagnosis was postganglionic internal ophthalmoplegia attributed to a viral ciliary ganglionopathy. Nineteen months later, he had developed an incomitant exodeviation and a supraduction deficit. Brain MRI revealed a mass consistent with an arachnoid cyst compressing the third cranial nerve in the right interpeduncular cistern. Resection of the cyst led to a persistent complete third cranial nerve palsy. This is the second reported case of prolonged internal ophthalmoplegia in a young child as a manifestation of a compressive third cranial nerve palsy. Our patient serves as a reminder that isolated internal ophthalmoplegia with cholinergic supersensitivity is compatible with a preganglionic compressive third nerve lesion, particularly in a young child.

Adult-onset acquired oculomotor nerve paresis with cyclic spasms: relationship to ocular neuromyotonia.

PURPOSE: To describe the characteristics and significance of acquired oculomotor nerve paresis with cyclic spasm. METHOD: Retrospective case series of two patients with a history of previous skull base irradiation for intracranial tumor who developed double vision and were found to have oculomotor nerve paresis with cyclic spasm. Both patients underwent a complete neuroophthalmologic assessment, including testing of eyelid position, pupillary size and reactivity, and ocular motility and alignment during both the paretic and spastic phases of the condition. RESULTS: Both patients developed unilateral lid retraction and ipsilateral esotropia with limitation of abduction during the spastic phase of the cycle, with ipsilateral ptosis, exotropia, and variable limitation of adduction during the paretic phase. The cycles were continuous and were not induced or altered by eccentric gaze. CONCLUSIONS: Cyclic oculomotor nerve paresis with spasms may occur years after irradiation of the skull base. This condition is different from the more common ocular motor disturbance that occurs in this setting-ocular neuromyotonia. However, in view of the similarity between these two disorders, it seems likely that they are caused by a similar peripheral mechanism.

Dilated pupil during endoscopic sinus surgery: what does it mean?

Endoscopic sinus surgery has become the standard of care for the surgical management of chronic sinus disease. Sinus disease and its surgical treatment carry the risk of orbital complications, irrespective of the approach. Orbital complications associated with sinus surgery include nasolacrimal duct damage, extraocular muscle injury, intraorbital hemorrhage/emphysema, and direct optic nerve damage, resulting in blindness. The finding of an unequal pupil at the end of a procedure would be a cause of considerable concern, but it is most likely due to the topical contamination of the eye with a mydriatic pharmacological agent commonly used in endoscopic sinus surgery.

[Episodic benign unilateral mydriasis. Clinical case in a girl]. / Midriasis unilateral benigna episódica. Caso clínico en una niña.

INTRODUCTION: Pupil asymmetry is an alarm signal which should lead to investigation to rule out severe underlying neurological disorders. Among its causes are tumors, aneurysms and hernia of the uncus. The differential diagnosis should also include other conditions such as Adie's tonic pupil, the Pourfour de Petit syndrome and local disorders such as closed angle glaucoma or segmental spasm of the iris dilator muscle. In practice however, exposure to mydriatic substance is one of the commonest causes. Another cause of this sign is benign episodic unilateral mydriasis. This uncommon condition has been defined as an isolated benign cause of pupil asymmetry. The underlying physiopathology is not always clear and may involve either parasympathetic deficiency or sympathetic hyperactivity affecting the iris. Usually related to migraine, some authors classify it as a limited form of ophthalmoplegic migraine, although some cases have been described with no accompanying headache. CLINICAL CASE: We describe a case of benign episodic unilateral mydriasis in a six-year-old girl who presented with intermittent episodes of pupil asymmetry with no other neurological symptoms. CONCLUSION: We underline the rarity of this condition in children with no simultaneous headache.

Residuals analysis of the generalized linear models for longitudinal data.

The generalized estimation equation (GEE) method, one of the generalized linear models for longitudinal data, has been used widely in medical research. However, the related sensitivity analysis problem has not been explored intensively. One of the possible reasons for this was due to the correlated structure within the same subject. We showed that the conventional residuals plots for model diagnosis in longitudinal data could mislead a researcher into trusting the fitted model. A non-parametric method, named the Wald-Wolfowitz run test, was proposed to check the residuals plots both quantitatively and graphically. The rationale proposedin this paper is well illustrated with two real clinical studies in Taiwan.