Kedu ihe na-akpata ọdịda eriri optic?
1. Eriri anya dị oke ogologo. 2. Ngbagọ gabiga ókè. 3. Eriri anya a gbajiri ma ọ bụ gbajie, eriri anya a na-etinyekwa nrụgide na-adịghị mma. Dịka ọmụmaatụ, mgbe eriri anya a na-etinye nrụgide ma ọ bụ mgbanwe okpomọkụ, axis nke...
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