Two causes for nightblindness......
Two organisms that penetrate intact cornea......
Two differences between pterygium and bitots spots clinically...
Two causes for nightblindness......
Two organisms that penetrate intact cornea......
Two differences between pterygium and bitots spots clinically...
1. Vit A def & Retinitis Pigmentosa
2. Neisseria Gonorrhea & C.Diphtheria
3. Age
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