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The effect of topical 1% cyclopentolate on Nidek AL-Scan optical biometry

Poster Details

First Author: A.Kulak TURKEY

Co Author(s):    A. Tenlik   E. Guler   Y. Totan        

Abstract Details


To investigate the effects of topical cyclopentolate on ocular biometry parameters and intraocular lens (IOL) power calculation in healthy adults.


Turgut Ozal University Hospital, Department of Ophthalmology, Ankara, Turkey.


This study prospectively enrolled 30 eyes of 30 participants with a mean age of 22.1 ± 4.7 years (range, 18 to 37 years). Axial length (AL), anterior chamber depth (ACD), corneal curvature, and white-to-white (WTW) measurements were performed with and without cycloplegia by 45-minutes interval. A partial optical coherence interferometry (AL-Scan, Nidek CO, Aichi, Japan) was used for ocular parameter measurement .The IOL powers were calculated using four formulas: SRK-T, Holladay 1, Hoffer Q, and Haigis. The pre- and postcycloplegic measurements were evaluated by using the paired t-test.


Cycloplegia had no significant effect on AL, keratometric values and WTW except ACD, which significantly increased postcycloplegia (0.10 ± 0.06 mm) (p less than 0.001). However, no significant change for IOL power was detected using the all four formulas.


Topical application of 1% cyclopentolate can increase ACD with no significant effect on IOL power calculation by Nidek AL-Scan optical biometry.

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