Medical Examination Standards for Airmen Article 21

Visual acuity shall be as follows:1. The distant visual acuity in each (either right or left) naked eye or the eyes corrected with spectacles or monofocal, non-tinted contact lenses shall be 20/20. However, in case of corrective visual acuity, the airmen shall wear those corrective lenses when they are performing the duties privileged by the certificates issued to such airmen.2. The near vision in each (either right or left) naked eye or the eyes corrected with spectacles or monofocal, non-tinted contact lenses shall be 20/40. However, in case of corrective vision, the airmen shall wear those corrective lenses when they are performing the duties privileged by the certificates issued to such airmen.3. For the airmen aged 50 or more, the intermediate visual acuity in each (either right or left) naked eye or the eyes corrected with spectacles or monofocal, non-tinted contact lenses shall be 20/40. However, in case of corrective visual acuity, the airmen shall wear those corrective lenses when they are performing the duties privileged by the certificates issued to such airmen.4. The ocular movement shall normal. The vertical phoria shall not be over one (1) prism diopter in heterophoric case and shall not be over six (6) prism diopters in each esophoric and exophoric cases.5. The night vision shall normally function.6. The eyes shall have normal stereopsis function. The depth perception shall not be over than 50 second farc.7. Applicants whose uncorrected distant visual acuity in either eye is worse than 20/200 shall be required to provide a full ophthalmic report every five years.The airmen by ways of corrections other than those corrective methods mentioned above, to meet the standards of visual acuity set out in the paragraphs 1 through 2 of this Article 21, shall be verified by CAA.