U. C. Ogbonna

Effect of Yellow Filters and Corrective Lenses on Academic Performance of Primary School Children with Abnormal Contrast Sensitivity

C. J. Samuel- Nwokeji, N. C. Ikoro, E. C. Esenwah, A. U. Megwas, Y. C. Azuamah, N. C. Ibe & U. C. Ogbonna · Ophthalmology Research: An International Journal · 2020

Aim: This study compared the effect of yellow filters and corrective lenses on the academic performance of primary school children with abnormal contrast sensitivity. Study Design: The study employed quantitative study design involving the measurement of variables. Place and Dura...

Open access Research Article 10.9734/or/2020/v13i130156

Determination of Luminance Levels of Visual Acuity Charts in Selected Eye Clinics in Owerri and Their Effects on Vision

E. C. Nkeremuzor, N. C. Ikoro, E. C. Esenwah, C. Nzotta, G. I. Ugwuoke, O. M. Nwaigwe & U. C. Ogbonna · Asian Journal of Research and Reports in Ophthalmology · 2020

Aim: The study on the determination of the luminance levels of visual acuity charts in selected eye clinics in Owerri and their effects on vision, was carried out in 14 eye clinics in Owerri, Imo State. Study Design: The study design employed in this study was the quantitative ty...

Open access Research Article