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正常人的视力用国际标准视力表检查5米远视力应在1.0以上,对数视力表检查应为5.0以上。如果经正规检查视力达不到上述标准,即为视力减退。 老年人视力减退的常见原因有远视及老花、老年性白内障、慢性青光眼、眼底病等,下面就这些常见眼病的症状简述如下,以便帮助老年朋友积极预防,早期发现,及时治疗。 一、远视及老花 远视眼的视力好坏与远视程度及绝对性远视程度有密切关系。轻度远视可被调节作用所代偿,而不出现视力降低;但远视如不能被调节作用所代偿即为绝对性远视,常引起不同程度的视力下降。特别是随着年龄的增长,调
Normal vision with international standard visual acuity check 5 meters away from the vision should be above 1.0, logarithmic visual acuity check should be 5.0 or more. If the formal inspection fails to meet the above criteria, it is vision loss. Common causes of vision loss in the elderly are hyperopia and presbyopia, senile cataracts, chronic glaucoma, ocular fundus, etc. The following is a brief description of the symptoms of these common eye diseases, in order to help elderly friends to actively prevent, early detection, timely treatment. First, farsightedness and presbyopia Presbyopia eyesight is good or bad and myopia and the degree of absolute hyperopia are closely related. Mild hyperopia can be compensated by the role of adjustment, and without loss of vision; but if hyperopia can not be compensated by accommodation is absolute hyperopia, often causing varying degrees of vision loss. Especially with age, tune