Author/Authors :
Yekta, AbbasAli Department of Optometry - Mashhad University of Medical Sciences , Ostadi Moghaddam, Hadi Department of Optometry - Mashhad University of Medical Sciences , Heravian, Javad Department of Optometry - Mashhad University of Medical Sciences , Derakhshan, Akbar Department of Optometry - Mashhad University of Medical Sciences , Heydarian, Samira Department of Optometry - Mashhad University of Medical Sciences , Fotouhi, Akbar Department of Epidemiology and Biostatistics - School of Public Health - Tehran University of Medical Sciences , Hashemi, Hassan Noor Ophthalmology Research Center - Noor Eye Hospital , Rezvan, Farhad Noor Ophthalmology Research Center - Noor Eye Hospital , Behnia, Mehdi Noor Ophthalmology Research Center - Noor Eye Hospital , Aliakbari, Soheil Noor Ophthalmology Research Center - Noor Eye Hospital , Khabazkhoob, Mehdi Noor Ophthalmology Research Center - Noor Eye Hospital , Yekta, Reihaneh Department of Ophthalmology - Mashhad University of Medical Sciences
Abstract :
Purpose: To determine the relationship between refractive errors and ocular components values in
carpet weavers
Methods: Refractive errors and ocular components values were investigated in carpet weavers at
Mashhad city in Iran. After selection of samples, the individuals who had ophthalmic and systemic
disease effective on the refractive errors were excluded from the study. Refractive errors and
ocular components were measured by autorefractometry, A-Scan ultrasonography and,
keratometery, respectively.
Results: 269 carpet weavers including 191 male (71.9%) and 78 female cases (28.1%) with the
mean age of 41.30±6.5 years and range of 21 to 60 years were investigated in this study. The
average of spherical equivalent (SE) refraction of the subjects was -1.7±1.8 diopters (D). SE has a
significant relation to axial length (AL) (r=-0.564), anterior chamber depth (ACD) (r=-0.301),
vitreous chamber depth (VCD) (r=-0.557), lens thickness (LT) (r=0.170), and corneal curvature
radius (CR) (r=0.170). AL and VCD had the most relationship to myopia. The average values of the
AL, ACD, VCD, and LT of the subjects were 23.6, 3.2, 16.6 and 3.9 mm respectively. The average
of CR was 7.6 mm. Except LT, other optical components were significantly different in both
genders. ACD, VCD, and CR had an inverse relation to age and LT had a direct relation to age.
Conclusion: SE refraction in carpet weavers had a significant relation to the ocular components and
variation in SE refraction may be due to the changes of these elements.
