INDUCING AMETROPIAS IN HATCHLING CHICKS BY DEFOCUS - APERTURE EFFECTS AND CYLINDRICAL LENSES

被引：72

作者：

IRVING, EL ^{[1
]}

CALLENDER, MG ^{[1
]}

SIVAK, JG ^{[1
]}

机构：

[1] UNIV WATERLOO, SCH OPTOMETRY, WATERLOO, ON N2L 3G1, CANADA

来源：

VISION RESEARCH | 1995年 / 35卷 / 09期

关键词：

CHICK; DEFOCUS; ASTIGMATISM; APERTURE SIZE; APERTURE SHAPE;

D O I：

10.1016/0042-6989(94)00235-E

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Light-weight translucent plastic goggles with convex or concave rigid contact lens inserts were applied unilaterally to the eyes of young chicks. Convex and concave cylindrical lenses produced astigmatic refractive errors. The magnitude of the induced astigmatism was less than that of the inducing lens and varied with asis orientation. Decreased aperture size or interruption of the defocus resulted in a decreased response to refractive defocus. Slit apertures and spherical defocus produced variable amounts of myopia, hyperopia and astigmatism. Choroidal changes (increased thickness) were observed only in birds developing hyperopia or recovering from myopia.

引用

页码：1165 / 1174

页数：10

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