Compatibility of Spectacles with their Prescriptions in Central Anatolia

Compatibility of Spectacles with their Prescriptions in Central Anatolia

Abstract Purpose: To investigate compatibility of spectacles with their prescriptions. Methods: This study was conducted prospectively between October 2007 and March 2009. A total of 1002 spectacles of 1002 individuals were included in the study. First right and then left lenses of the spectacles we...

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Bibliographic Details
Published in:Seminars in ophthalmology Vol. 30; no. 1; pp. 29 - 35
Main Authors: Ilhan, Nilufer, Dogan, Hakki, Ilhan, Ozgur, Coskun, Mesut, Bulut, Betul Tasar, Ersekerci, Tulay Karacan
Format: Journal Article
Language:English
Published: England Informa Healthcare USA, Inc 01-01-2015
Informa Healthcare
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Asthenopia
Asthenopia - etiology
Child
Child, Preschool
Eyeglasses - adverse effects
Eyeglasses - standards
Female
Humans
Male
Middle Aged
prescription
Prescriptions - standards
prismatic effect
Prospective Studies
refractive error
Refractive Errors - rehabilitation
spectacles
Turkey
Visual Acuity
Young Adult
Turkey
spectacles
prismatic effect
refractive error
prescription
Asthenopia
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Summary:Abstract Purpose: To investigate compatibility of spectacles with their prescriptions. Methods: This study was conducted prospectively between October 2007 and March 2009. A total of 1002 spectacles of 1002 individuals were included in the study. First right and then left lenses of the spectacles were measured with a Topcon CL-200 digital lensmeter. Interpupillary distance (PD) of the subjects was measured. Spherical, cylindrical, and axial differences between the prescription and the spectacles were separately calculated for the left and right lenses. Prismatic effect (PE) of the lenses, with decentralized focus according to the pupil, its base direction, and amount of decentralization, were measured. Results: A total of 505 (50.4%) of the subjects were female and 497 (49.6%) were male. The mean age was 37.0 (range 3-81). The mean PD of the subjects was 59.9 ± 4.09 mm, and mean optical center distance (OCD) of the lenses was 65.6 ± 4.07 mm. The difference between PD and OCD was significant (p < 0.001). While the right spherical, cylindrical, and axial differences and left spherical, cylindrical, and axial differences between the prescription and the spectacles were not significant, the left axial difference was statistically significant (p < 0.001). The decentralization direction was towards the lower temporal with a percentage of 76.8% on the right and 80.3% on the left lenses. The mean amount of the decentralization was 4.37 ± 2.39 mm on the right and 4.63 ± 2.36 mm on the left. Conclusion: Dioptric error in the spectacles was quite low. However, there may be a small amount of axis deviation at the time of mounting the lens to the frame. We conclude that asthenopic complaints due to PE caused by the decentralization of the optic center of the lenses are quite important. Examination of the spectacles after they are prepared can be deemed as a solution to reduce asthenopic complaints due to improper spectacles.
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ISSN:0882-0538
1744-5205
DOI:10.3109/08820538.2013.810287