Open Access Short communication

Open Access Short communication

Open Access Short communication

Open Access Original Research Article

Effect of Colour Vision on Ocular Deviation

Partha Haradhan Chowdhury, Brinda Haren Shah

Ophthalmology Research: An International Journal, Page 1-4
DOI: 10.9734/OR/2018/40609

Purpose: The aim of the present study is to correlate the effect of colour vision in the presence of ocular deviation.

Methods: A pilot, cross-sectional, observational study was performed at tertiary eye care centers. Subjects with an Ocular deviation between 10 to 40 prism diopters, Corrected distance Visual Acuity should be greater than 6/18 and Age should be between 10 to 40 years of age were included in the study. Colour vision was assessed with Fransworth Munsell D 15 colour vision test.

Results: 30 subjects were included in the study. Out of that, 16 subjects were in the age group of 11-20 years, 12 subjects were in the age group of 21-30 years and 2 subjects were in the age group of 31-40 years. 60% subjects were Female and 40% subjects were Male. Mean scores of visual parameters were taken. In 50 % of cases, colour vision was found normal, 33 % were having mild tritanopia and 17% were having moderate tritanopia.

Conclusions:  In cases of ocular deviation, mild to moderate tritanopia can occur.


Open Access Original Research Article

Repair of Severe Melting Ulcers with High Intensity UV-pen (18 to 60 mW/cm2) Corneal Cross-linking (CXL) and Amniotic Membrane Graft

Anna Malska, Rebecca Elks, Barbara Gonella, Jui- Teng Lin

Ophthalmology Research: An International Journal, Page 1-8
DOI: 10.9734/OR/2018/41495

Aims: To assess the efficacy of corneal collagen cross-linking (CXL) combined with amniotic membrane graft in the management of severe melting ulcers in the dog and cat using a UV-pen at high intensity.

Study Design: CXL for animal ulcers.

Place and Duration of Study: Kent, UK between June, 2016 and Dec. 2017; and between Feb, 2018 and April, 2018,

Methodology: Medical records of dogs and cats diagnosed with severe melting ulcers, managed with corneal CXL and Omnigen® graft during 2016 and 2017 were retrospectively reviewed. A specially designed small spot size (3 to 10 mm) UV-pen (CXL-100-PEN; made by New Vision Inc, Taiwan) with intensity range of 30 to 60 mW/cm2 was used for localized treatment. Following surgical preparation of the recipient cornea, the corneas were soaked with 0.1% riboflavin in 20% Dextran for 15 minutes followed by UV-A (365 nm) irradiation for 60 to 120 seconds, depending on areas treated. Following CXL, Omnigen® graft (1-3 layers) was sutured in the lesion with 8-0 polyglactin 910 (Vicryl; Ethicon). Ten dogs (10 eyes), and three cats (3 eyes) were included.  Canine brachycephalic breeds were over represented (7/10 eyes). All eyes had been treated medically prior to surgery, with post-operative antibiotics based on culture-sensitivity results.  Treated lesions included large, deep melting ulcers, with 3 extending to Descemet's membrane.

Results: Mean follow-up time was 8 to10 weeks (range 8-52 weeks).  In all cases corneal melting was arrested, with improved ocular comfort within 3 to 6 days of treatment.  In 11 eyes the cornea re-epithelialised within 8-20 days.  Corneal perforation occured in 2 eyes between day 16 to 20. Good visual outcome was achieved in 10 cases; with extensive corneal pigmentation in one case, which stil remained visual.

Conclusion: CXL combined with an Omnigen® graft is a valuable technique for managing severe keratomalcia, resulting in a good visual outcome compared to traditional grafts.