Frequency of undetected binocular vision anomalies among ophthalmology trainees / Frecuencia de anomalías de visión binocular no detectadas entre los estudiantes de Oftalmología

PURPOSE: The use of ophthalmic instruments requires increased effort on the accommodation and vergence system. This study aimed to understand the prevalence of binocular vision anomalies among ophthalmology trainees attending a surgical training program at a tertiary eye care center. METHODS: This prospective cohort study was carried out between April and November 2017 at a tertiary eye care center in South India. All the ophthalmology trainees inducted for the training programs at the institution underwent a comprehensive ophthalmic and binocular vision assessment. Subjects with previous diagnosis of binocular vision dysfunction and vision therapy were excluded. RESULTS: The mean (SD) age of the subjects was 29 (3) among which 48 were females. Out of the total 75 subjects, 66 had prior surgical experience [range: 1 to 17 years]. Thirty-eight subjects were asymptomatic and 37 were symptomatic. The most common asthenopic symptom was the presence of headache. Forty-one (55%) out of the 75 had a diagnosis of a non-strabismic binocular vision dysfunction. The range of phoria at distance was orthophoria to 14 Prism Diopter (PD) exophoria (mean +/− SD: −1 +/− 3), and at near 4PD esophoria to 25PD exophoria (mean +/− SD: −4 +/− 5). Based on standard diagnostic criteria, 15 subjects (20%) had convergence insufficiency, 14 (19%) had accommodative infacility, 9 (12%) had intermittent divergent squint (IDS), while 3 subjects (4%) had convergence excess. CONCLUSIONS: This study shows the high frequency of binocular vision dysfunctions among ophthalmology trainees joining a tertiary eye care center

OBJETIVO: El uso de instrumentos oftálmicos requiere un esfuerzo incrementado de los sistemas de acomodación y vergencia. El objetivo de este estudio fue comprender la prevalencia de anomalías de visión binocular entre los alumnos de oftalmología que asistían a un programa de formación quirúrgica en un centro terciario de cuidados oculares. MÉTODOS: Este estudio de cohorte prospectivo fue realizado entre abril y noviembre de 2017 en un centro terciario de cuidados oculares en el sur de India. Todos los estudiantes de oftalmología inscritos en los programas de formación en el centro fueron sometidos a un amplio examen oftálmico y binocular. Se excluyó a los sujetos con diagnóstico previo de disfunción de visión binocular y terapia ocular. RESULTADOS: La edad media (DE) de los sujetos fue de 29 años (3), de los cuales 48 eran mujeres. Del total de 75 sujetos, 66 tenían experiencia quirúrgica previa [rango: de 1 a 17 años]. Treinta y ocho sujetos eran asintomáticos y 37 sintomáticos. El síntoma de astenopía más común fue la presencia de cefalea. Cuarenta y uno (55%) de los 75 sujetos fueron diagnosticados de disfunción visual binocular no estrábica. El rango de foria de lejos fue de ortoforia a 14 dioptrías prismáticas (DP) a exoforia (media +/− DE: −1 +/− 3) y, de cerca, de esoforia a 4DP a esoforia a 25DP (media +/− DE: −4 +/− 5). Basándonos en criterios diagnósticos estándar, 15 sujetos (20%) tenían insuficiencia de convergencia, 14 (19%) falta de facilidad acomodativa, 9 (12%) tenían estrabismo divergente intermitente (EDI), y 3 sujetos (4%) tenían exceso de convergencia. CONCLUSIONES: Este estudio muestra la alta frecuencia de disfunciones de visión binocular entre los estudiantes de oftalmología que acudierona un centro terciario de cuidados oculares

The painless eye: Neurotrophic keratitis in a child suffering from hereditary sensory autonomic neuropathy type IV.

Hereditary sensory autonomic neuropathy (HSAN) is a group of inherited disorders (total 5 types) that are associated with sensory dysfunction and varying degrees of autonomic dysfunction. HSAN type IV (HSAN-IV) or congenital insensitivity to pain and anhidrosis (CIPA) is a rare genetic disorder inherited in an autosomal recessive manner. We report a case of this very rare genetic disease in a 3-year-old girl child, born to a family in north India with ocular features of neurotrophic keratitis. The diagnosis was made clinically based on the hallmark features of insensitivity to pain and temperature, anhidrosis, self-mutilating behavior with multiple recurrent oral ulcers, nasal bleeds, multiple trophic ulcers over joints, and decreased intellect.

Frequency of undetected binocular vision anomalies among ophthalmology trainees.

PURPOSE: The use of ophthalmic instruments requires increased effort on the accommodation and vergence system. This study aimed to understand the prevalence of binocular vision anomalies among ophthalmology trainees attending a surgical training program at a tertiary eye care center. METHODS: This prospective cohort study was carried out between April and November 2017 at a tertiary eye care center in South India. All the ophthalmology trainees inducted for the training programs at the institution underwent a comprehensive ophthalmic and binocular vision assessment. Subjects with previous diagnosis of binocular vision dysfunction and vision therapy were excluded. RESULTS: The mean (SD) age of the subjects was 29 (3) among which 48 were females. Out of the total 75 subjects, 66 had prior surgical experience [range: 1 to 17 years]. Thirty-eight subjects were asymptomatic and 37 were symptomatic. The most common asthenopic symptom was the presence of headache. Forty-one (55%) out of the 75 had a diagnosis of a non-strabismic binocular vision dysfunction. The range of phoria at distance was orthophoria to 14 Prism Diopter (PD) exophoria (mean +/- SD: -1 +/- 3), and at near 4PD esophoria to 25PD exophoria (mean +/- SD: -4 +/- 5). Based on standard diagnostic criteria, 15 subjects (20%) had convergence insufficiency, 14 (19%) had accommodative infacility, 9 (12%) had intermittent divergent squint (IDS), while 3 subjects (4%) had convergence excess. CONCLUSIONS: This study shows the high frequency of binocular vision dysfunctions among ophthalmology trainees joining a tertiary eye care center.

The rare phenomenon of Marcus-Gunn jaw winking without ptosis: Report of 14 cases and review of the literature.

Purpose: To report a rare case series of 14 patients of the Marcus-Gunn jaw-winking phenomenon (MGJWP) without ptosis. Methods: This was a retrospective noninterventional case series. The medical records of all patients diagnosed with MGJWP over the past 10 years were retrieved. Patients with documented evidence of absence of ptosis were segregated and analyzed for visual acuity, the severity of Marcus-Gunn, the presence of squint and amblyopia, and the presence of other aberrant regenerations. Results: A total of 207 patients were diagnosed with MGJWP, out of which 14 (6.76%) patients had isolated MGJWP without blepharoptosis. The mean age of presentation was 9.5 years and males and females were equally affected. The left eye was involved more commonly (57.2%) than the right eye. Twelve patients were congenital and two were presumed to be of traumatic origin. The most common refractive error in this cohort was astigmatism (10, 71.42%), followed by hyperopia (5, 35.71%). One patient had anisometropic amblyopia. Marcus-Gunn was found to be mild (≤2 mm of lid excursion) in all cases. None of the patients had strabismus or any other aberrant innervations. None of the patients underwent surgery and did not develop ptosis or worsening or improvement of Marcus-Gunn after a mean follow-up period of 2.3 years. Conclusion: Isolated MGJWP in the absence of ptosis is a very rare entity and this is the largest series to date to report such an occurrence. All patients had a mild form of MGJWP with no intervention required in any of the cases.

Natural history of idiopathic abducens nerve paresis in a young adult / Historia natural de paresia idiopática del nervio abducens en un adulto joven

The natural history of idiopathic abducens nerve paresis and the role of conservative management such as vision training during the recovery process is not well documented in the literature to the best of our knowledge. This case report presents the natural recovery process of idiopathic abducens nerve paresis in a young adult and the role of vision therapy in the recovery process (AU)

Hasta la fecha, la historia natural de la paresia idopática del nervio abducens y la función de un tratamiento conservador como la terapia visual durante el proceso de recuperación no se hallan bien documentadas en la literatura. Este informe de un caso presenta el proceso de recuperación natural de la paresia idiopática del nervio abducens en un adulto joven, así como la función de la terapia visual en el proceso de recuperación (AU)

ICO-OSCAR for pediatric cataract surgical skill assessment.

Pediatric cataract surgical skill assessment is important to ensure the competency of the trainees, especially pediatric ophthalmology fellows. Using a rubric would ensure objectivity in this process. The ICO-OSCAR pediatric cataract surgery rubric has been developed with global variations in techniques of pediatric cataract surgery in mind.

Natural history of idiopathic abducens nerve paresis in a young adult.

The natural history of idiopathic abducens nerve paresis and the role of conservative management such as vision training during the recovery process is not well documented in the literature to the best of our knowledge. This case report presents the natural recovery process of idiopathic abducens nerve paresis in a young adult and the role of vision therapy in the recovery process.

Iatrogenic Injury to Medial Rectus After Endoscopic Sinus Surgery.

Endoscopic sinus surgery (ESS) is the mainstay of the treatment in sinus disorders, to re-establish the drainage of the affected sinus. The close proximity of the orbital structures to paranasal sinuses makes them vulnerable to inadvertent injury during the sinus surgery. Medial rectus (MR) muscle is the most commonly injured extraocular muscle during ESS due to its anatomic proximity to the thin medial wall of the orbit. This is a non-comparative, retrospective, interventional case series of six patients presenting with MR injury after ESS. We discuss the management, outcome and review the published literature. A total of six patients met the inclusion criteria. The presenting complaints were diplopia, squinting and limitation of ocular movements. Two patients underwent surgical exploration of the MR muscle and reattachment of the muscle along with injection botulinum to the antagonist lateral rectus muscle. Two patients who had small angle strabismus and who were able to fuse were advised orthoptic exercises and prisms as management. Remaining two patients were advised surgical intervention to correct strabismus but they declined further surgical intervention. Management of MR injury following ESS is complex, often resulting in suboptimal outcomes. Since early intervention is associated with better outcomes, early referral by otolaryngologists to ophthalmologists would result in better outcome.

Brown's syndrome with ocular albinism: Case report of a rare presentation and literature review.

We report a rare case of Brown's syndrome associated with ocular albinism in a 10-year-old boy. This report highlights the importance of further analysis of cases of Brown's syndrome and throws some light on the etiology and association of this rare condition.

The positron emission mammography/tomography breast imaging and biopsy system (PEM/PET): design, construction and phantom-based measurements.

Tomographic breast imaging techniques can potentially improve detection and diagnosis of cancer in women with radiodense and/or fibrocystic breasts. We have developed a high-resolution positron emission mammography/tomography imaging and biopsy device (called PEM/PET) to detect and guide the biopsy of suspicious breast lesions. PET images are acquired to detect suspicious focal uptake of the radiotracer and guide biopsy of the area. Limited-angle PEM images could then be used to verify the biopsy needle position prior to tissue sampling. The PEM/PET scanner consists of two sets of rotating planar detector heads. Each detector consists of a 4 x 3 array of Hamamatsu H8500 flat panel position sensitive photomultipliers (PSPMTs) coupled to a 96 x 72 array of 2 x 2 x 15 mm(3) LYSO detector elements (pitch = 2.1 mm). Image reconstruction is performed with a three-dimensional, ordered set expectation maximization (OSEM) algorithm parallelized to run on a multi-processor computer system. The reconstructed field of view (FOV) is 15 x 15 x 15 cm(3). Initial phantom-based testing of the device is focusing upon its PET imaging capabilities. Specifically, spatial resolution and detection sensitivity were assessed. The results from these measurements yielded a spatial resolution at the center of the FOV of 2.01 +/- 0.09 mm (radial), 2.04 +/- 0.08 mm (tangential) and 1.84 +/- 0.07 mm (axial). At a radius of 7 cm from the center of the scanner, the results were 2.11 +/- 0.08 mm (radial), 2.16 +/- 0.07 mm (tangential) and 1.87 +/- 0.08 mm (axial). Maximum system detection sensitivity of the scanner is 488.9 kcps microCi(-1) ml(-1) (6.88%). These promising findings indicate that PEM/PET may be an effective system for the detection and diagnosis of breast cancer.