MEASUREMENT OF POSTERIOR CORNEAL SURFACE TORICITY

被引：41

作者：

ROYSTON, JM ^{[1
]}

DUNNE, MCM ^{[1
]}

BARNES, DA ^{[1
]}

机构：

[1] UNIV ASTON,OPHTHALM & PHYSIOL OPT RES GRP,ASTON TRIANGLE,BIRMINGHAM B4 7ET,W MIDLANDS,ENGLAND

来源：

OPTOMETRY AND VISION SCIENCE | 1990年 / 67卷 / 10期

关键词：

Keratometry; Posterior corneal surface; Purkinje images; Three meridional analysis;

D O I：

10.1097/00006324-199010000-00002

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

We describe a method in which posterior corneal surface toricity can be determined by photographing catoptric (Purkinje) images in three fixed meridians simultaneously using infrared light sources. Keratometry, the comparison of anterior and posterior corneal catoptric (Purkinje) images and pachometric results, are applied to three meridional analysis equations, allowing the posterior corneal surface to be described in spherocylindrical form. The technique is evaluated on five subjects with anterior corneal radii varying from 7.11 to 8.52 mm. © 1990 American Academy of Optometry.

引用

页码：757 / 763

页数：7

共 31 条

[1]

Lowe R.F., Clark B., Posterior corneal curvature. Correlations in normal eyes and In eyes involved with primary angle-closure glaucoma, Br J Ophthalmol, 57, pp. 464-470, (1973)

[2]

Hockwin O., Weigelin E., Lazer H., Dragomirescu V., Biometry of the anterior eye segment by Scheimpflug photography, Ophthal Res, 15, pp. 102-108, (1983)

[3]

Tscherning M., Physiologic Optics (Trans Weiland C), (1904)

[4]

Laurence L., General and Practical Optics, pp. 593-602, (1920)

[5]

Bennett A.G., Refraction by automation?, Optician, 139, pp. 5-9, (1960)

[6]

Brubaker R.F., Reinecke R.D., Copeland J.C., Meridional refrac-tometry. 1. Derivation of equations, Arch Ophthalmol, 81, pp. 849-853, (1969)

[7]

Reinecke R.D., Carroll J., Beyer C.K., Montross R.T., An innovation in eye care, Sight Sav Rev, 42, pp. 35-41, (1972)

[8]

Malacara D., Measurement of visual refractive defects with a gas laser, Am J Optom Physiol Opt, 51, pp. 15-23, (1974)

[9]

Phillips D., Sterling W., Dwyer W.O., Validity of the laser refraction technique for determining cylindrical error, Am J Optom Physiol Opt, 52, pp. 328-331, (1975)

[10]

Flaine C.L., Long W.F., Reading R.W., Laser meridional refrac-tometry, Am J Optom Physiol Opt, 53, pp. 194-204, (1976)

← 1 2 3 4 →