Effect of eyedrops and applanation tonometry on optical biometry

Abstract

Phenylephrine, tropicamide, fluorescein–proparacaine eyedrops, and GAT did not significantly affect predicted postoperative refraction as measured by the Lenstar optical biometer.

Comment on: Effect of eyedrops and applanation tonometry on optical biometry

“…We read with great interest the article by Nayer et al describing the effect of eyedrops and applanation tonometry on optical biometry. 1 In our opinion, in this article there are some points that need to be discussed. The authors performed optical biometry measurements before and after the application of phenylephrine, tropicamide, and fluorescein-proparacaine and after Goldmann applanation tonometry (GAT) measurements, to study the eventual changes induced by the drops and GAT independently.…”

“…The authors previously advocated performing pinhole pupilloplasty (PPP) that is sized to approximately 1.5 mm diameter and is centered on Purkinje-1 reflex. 1,2 However, from our experience, we have realized that 1.5 mm size might not be ideal for all cases. The authors record the best visual acuity that is achieved with the pinhole device of a specific diameter, and an attempt is made to achieve the pinhole pupil of the same size.…”

“…We read with great interest the article by Nayer et al describing the effect of eyedrops and applanation tonometry on optical biometry. 1 In our opinion, in this article there are some points that need to be discussed.…”