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頁籤選單縮合
題 名 | Development of Visual Acuity and Stereoacuity in Infants: Normal and Abnormal |
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作 者 | Awaya,Shinobu; | 書刊名 | 中眼醫訊 |
卷 期 | 3:1=7 1993.03[民82.03] |
頁 次 | 頁22-25 |
分類號 | 417.671 |
關鍵詞 | 小兒; 視力檢查; Visual acuity; Stereoacuity; Infants; |
語 文 | 英文(English) |
英文摘要 | I have described a positive definition of amblyopia, which is developmental retardation of visual system caused by the abnormal visual environments occurring in the sensitive period of visual system. It is very important to understand normal development of visual acuity and stereoacuity as well as the methods to measure these visual functions, in order to correctly understand abnormal situations. Measurements and normal development of visual acuity and stereoacuity in infants have been discussed. Visual acuity of approximately 0.02 occurring at birth will develop up to 1.0 by the end of the 3rd year of life. Stereoacuity is not present at birth but starts to develop around the 3rd or 4th month after birth. Stereoacuity of approximately 1700 sec. of arc in these months will gradually develop to 500 sec. of arc or better by the end of the 3rd year of life. Definition and etiological classification of amblyopia have been discussed. The meaning of the "Organic Amblyopia" or "Relative Amblyopia" has been clarified. The sensitive period of the visual system has been discussed from five parameters. Aniblyopia can becured, if appropriate treatments are given within the sensitive period. Furthermore, I have clarified the difference in meaning between the relative amblyopia and decrease in visual acuity caused by organic changes. All the six types of amblyopia are curable, so long as an appropriate treatment is given within the sensitive period of immature visual system. |
本系統中英文摘要資訊取自各篇刊載內容。