A COMPUTING SCHEME FOR DETERMINATION OF RETINAL CONTOUR FROM PERIPHERAL REFRACTION, KERATOMETRY AND A-SCAN ULTRASONOGRAPHY

被引:25
作者
DUNNE, MCM
机构
[1] Ophthalmic and Physiological Optics Research Group, Department of Vision Sciences, Aston University, Birmingham
关键词
D O I
10.1016/0275-5408(95)98243-G
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
In this paper a method is described in which retinal contour is derived from measurements of peripheral refraction, keratometry and A-scan ultrasonography. Theoretical aspects are discussed first, followed by a closer examination of the computing scheme and its evaluation. Evaluation involved investigation of inherent errors arising from the computing scheme's methods of compensating for unmeasured human ocular complexities such as crystalline lens asphericity and gradient index optical structure, finite aperture pupils, ocular surface misalignment and toricity. It is found that computed retinal contours are little affected by these inherent errors.
引用
收藏
页码:133 / 143
页数:11
相关论文
共 42 条
[1]  
Bennett, Rabbetts, Clinical Visual Optics, pp. 250-252, (1989)
[2]  
Bennett, Rabbetts, Clinical Visual Optics, pp. 342-344, (1989)
[3]  
Bennett, Rabbetts, Clinical Visual Optics, (1989)
[4]  
Bennett, Rabbetts, Clinical Visual Optics, (1989)
[5]  
Ferree, Rand, Hardy, Refraction for the peripheral field of vision, Archives of Ophthalmology, 5, pp. 717-731, (1931)
[6]  
Rempt, Hoogerheide, Hoogenboom, Peripheral retinoscopy and the skiagram, Ophthalmologica, 162, pp. 1-10, (1971)
[7]  
Millodot, Effect of ametropia on peripheral refraction, Am. J. Optom. Physiol. Opt., 58, pp. 691-695, (1981)
[8]  
Dunne, Barnes, Modelling oblique astigmatism in eyes with known peripheral refraction and optical dimensions, Ophthal. Physiol. Opt., 10, pp. 46-48, (1990)
[9]  
Ferree, Rand, Interpretation of refractive conditions in the peripheral field of vision, Archives of Ophthalmology, 9, pp. 925-938, (1933)
[10]  
Charman, Jennings, Ametropia and peripheral refraction, Am. J. Optom. Physiol. Opt., 59, pp. 922-923, (1982)