Effect of Pupil Size on Optical Quality Parameters in Astigmatic Eyes Using a Double-Pass Instrument
Joint Authors
Kobashi, Hidenaga
Kamiya, Kazutaka
Yanome, Kyohei
Igarashi, Akihito
Shimizu, Kimiya
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-23
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Purpose.
To objectively determine the effects of pupil size on optical quality parameters in astigmatic eyes using a double-pass instrument.
Methods.
We examined twenty-two eyes of 22 healthy volunteers (mean age ± standard deviation, 27.1±2.8 years) who had no ophthalmic diseases other than refractive errors (manifest cylinder ≤0.25 diopters (D)).
After we fully corrected cycloplegic refraction, we created with-the-rule astigma tism of 1, 2, and 3 diopters in these eyes and then quantitatively assessed the modulation transfer function (MTF) cutoff frequency and the Strehl2D ratio with 2-, 4-, and 6-mm pupil sizes using the Optical Quality Analysis System.
Results.
The MTF cutoff frequency and the Strehl2D ratio decreased significantly as the amount of astigmatism increased at each pupil size (P<0.001 for 2, 4, and 6 mm, analysis of variance).
They also decreased significantly with an increase in pupil size at each diopter of astigmatism (P<0.001 for 0, 1, 2, and 3 D).
Multiple comparisons demonstrated a significant difference between measurements made for a 2-mm pupil and for a 6-mm pupil at each diopter of astigmatism (P<0.001 for 0, 1, 2, and 3 D, Dunnett test) and those made for a 4-mm pupil and for a 6-mm pupil at each diopter of astigmatism (P<0.001 for 0 D, P<0.05 1, 2, and 3 D).
Conclusions.
Eyes with larger pupils had lower optical quality even when they were astigmatic.
It may be necessary to correct the preexisting astigmatism to acquire excellent visual performance, especially in astigmatic eyes with larger pupils.
American Psychological Association (APA)
Kobashi, Hidenaga& Kamiya, Kazutaka& Yanome, Kyohei& Igarashi, Akihito& Shimizu, Kimiya. 2013. Effect of Pupil Size on Optical Quality Parameters in Astigmatic Eyes Using a Double-Pass Instrument. BioMed Research International،Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-1003282
Modern Language Association (MLA)
Kobashi, Hidenaga…[et al.]. Effect of Pupil Size on Optical Quality Parameters in Astigmatic Eyes Using a Double-Pass Instrument. BioMed Research International No. 2013 (2013), pp.1-6.
https://search.emarefa.net/detail/BIM-1003282
American Medical Association (AMA)
Kobashi, Hidenaga& Kamiya, Kazutaka& Yanome, Kyohei& Igarashi, Akihito& Shimizu, Kimiya. Effect of Pupil Size on Optical Quality Parameters in Astigmatic Eyes Using a Double-Pass Instrument. BioMed Research International. 2013. Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-1003282
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1003282