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疑問点

(1)微小斜視では、異常融像があるか?

 

 

 

(解決済み)

(2-○)非調節性輻輳過多ではAC/A比は正常。(眼科学には正常と記載。)
AC/A比は調節性輻輳(⊿)/調節(D)・比
AC/A – Accommodative convergence/accommodation ratio
正常値は2~6⊿/D
prism diopter (PD) The unit measuring the deflection of light passing through a prism equal to a deflection of 1 centimeter at a distance of 1 meter.
1[Δ]=1[PD]=(1mの距離で1cm光を曲げる)
30°以内では、だいたい、2[Δ]=1[°]と考えてよい。

角度                             tanθ                   (プリズムジオプター)
1°                                0.01746                          1.7Δ
2°                                0.03492                          3.5Δ
10°                               0.17633                          17.6Δ
20°                              0.36397                          36.4Δ
30°                               0.57735                          57.7Δ

http://blogs.yahoo.co.jp/swdsn/34549597.html

http://www.eonet.ne.jp/~maya/kakudo.htm

(3)小児の視力の発達
http://www.aoa.org/documents/CPG-2.pdf
Newborn:20/400 – 20/1200
1 Month : 20/300 – 20/1200
2 Months : 20/150 – 20/600
6 Months : 20/50 – 20/200
18 Months : 20/40 – 20/100
24 Months : 20/30 – 20/80
3 Years : 20/20

(4)小児の両眼視の発達
Fixation of moving target : 4か月でResponse(+)
Stereopsis : 生下時None, 4ヶ月でEmerging, 6ヶ月でWell developed

未分類

Posted by twosquirrel