Relationship between the corneal surface and the anterior segment of the cornea: An Asian perspective

Abstract

There was a close relationship between the various corneal parameters, which is significant in refractive surgery and intraocular lens calculation and design.

Corneal power estimation for intraocular lens power calculation after corneal laser refractive surgery in Chinese eyes

“…17,18 Therefore, the steeper posterior corneal surface in Chinese eyes in our study might be a manifestation of this ocular dimensional difference because there is a close geometric relationship between corneal curvatures, corneal diameter, and corneal vault. 27 We also found that there was no difference in anterior corneal curvature and corneal thickness between Chinese eyes and German eyes. Our results are compatible with those in previous studies.…”

“…The latter can be solved by optimization of IOL power calculation formulas, especially the Haigis formula, which uses 3 coefficients to optimize the ELP prediction algorithm. 19 Several studies of IOL power calculation after corneal refractive surgery in Asian eyes have been published 6,11,[25][26][27] ; however, to date, a simplified method for corneal power estimation has not been evaluated in Asian eyes specifically. Therefore, subsequent research was performed based on our previous study.…”

Validity of the keratometric index: Large population-based study

“…12 We also reported a population study of 724 eyes measured with slit-scan topography. 13 Table 1 summarizes the findings in these studies.…”

“…12 We also reported a population study of 724 eyes measured with slit-scan topography. 13 Table 1 summarizes the findings in these studies.In this study, we calculated and tested the true keratometric index in a large population based on the actual measurement of the anterior corneal curvature …”

Extended scan depth optical coherence tomography for evaluating ocular surface shape

“…Several commercial imaging modalities are capable of providing shape information for the ocular surface. These devices include slit scanning topography, 8 ultrasound biomicroscopy, 9 Scheimpflug imaging, 10,11 and placido ring-based systems. 12 However, these methods are either limited to evaluating only the central cornea or just providing images with low sampling density due to insufficient acquisition speed.…”