Does astigmatism alter with cycloplegia?

Asharlous, A. and Hashemi, H. and Jafarzadehpur, E. and Mirzajani, A. and Yekta, A. and Nabovati, P. and Khabazkhoob, M. (2016) Does astigmatism alter with cycloplegia? Journal of Current Ophthalmology, 28 (3). pp. 131-136.

[img] Text
1-s2.0-S2452232516300567-main (1).pdf

Download (483kB)

Abstract

Purpose To determine the effect of the cyclopentolate 1 on the cylindrical and spherical components of the refraction. Methods Three hundred seventy-five eyes of 195 subjects, including 74 males and 121 females, aged from 3 to 59 years were refracted before and 30 min after cyclopentolate 1 eye drop instillation. To compare cylindrical data, power vector analysis (J0 and J45 cross cylinder) was applied. Results A statistically significant difference between the J0 values of the noncycloplegic and cycloplegic refraction was revealed (P = 0.006) while the J45 values did not significantly differ. 95 limit of agreement for dry and cycloplegic values of the J0 and J45 were −0.22 to 0.25 and −0.19 to 0.20, respectively. Astigmatism difference was separately analyzed in emmetropic, myopic and hyperopic eyes. The J0 difference was significant (P = 0.014) only in hyperopic eyes. Spherical equivalent (SE) values in cycloplegic refraction were significantly more hyperopic than those yielded in dry refraction by mean difference of +1.16 ± 1.20 diopters (P < 0.0001). Spherical equivalent difference (SED) values were negatively correlated with age. Conclusions Our findings indicated that cycloplegic drops caused a statistically significant shift in the “with the rule” and “against the rule” astigmatisms, although the oblique astigmatisms remained unaffected. Further research with larger sample sizes are needed to answer what mechanisms are involved in changing cylinder with cycloplegia. © 2016 Iranian Society of Ophthalmology

Item Type: Article
Additional Information: Cited By :1 Export Date: 16 February 2020 Correspondence Address: Khabazkhoob, M.; Department of Medical Surgical Nursing, School of Nursing and Midwifery, Shahid Beheshti University of Medical SciencesIran; email: khabazkhoob@yahoo.com
Uncontrolled Keywords: Agreement Astigmatism Cycloplegia Noncycloplegia cyclopentolate accommodation accommodation paralysis adolescent adult age distribution Article child clinical effectiveness controlled study drug instillation emmetropia eye examination eye refraction female human hypermetropia male myopia prospective study sex difference visual system parameters
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib4 lib4
Date Deposited: 03 Mar 2020 06:27
Last Modified: 03 Mar 2020 06:27
URI: http://eprints.mums.ac.ir/id/eprint/12925

Actions (login required)

View Item View Item