The Prevalence of Strabismus, Heterophorias, and Their Associated Factors in Underserved Rural Areas of Iran.

Published on May 2, 2017in Strabismus
· DOI :10.1080/09273972.2017.1317820
Hassan Hashemi55
Estimated H-index: 55
(Noor Eye Hospital),
Payam Nabovati11
Estimated H-index: 11
(IUMS: Iran University of Medical Sciences)
+ 3 AuthorsMehdi Khabazkhoob32
Estimated H-index: 32
(Shahid Beheshti University of Medical Sciences and Health Services)
Sources
Abstract
ABSTRACTPurpose: To determine the prevalence of different types of strabismus and heterophoria and their associated factors in underserved rural areas of Iran. Methods: Two rural areas in the north and southwest of Iran were randomly sampled using multistage cluster sampling. Individuals aged over 1 year, totaling 3851, were invited to participate in the study. In addition to collecting demographic data, optometric examinations were performed for each participant. Unilateral and alternating cover tests were performed at far (6 m) and near (40 cm) to detect tropia and phoria, respectively, and the magnitude of the deviation was measured using alternating cover test and prism bar. Tropia was defined as the presence of constant unilateral or alternating horizontal strabismus (exotropia or esotropia) at either far or near fixation distances. Far and near exophoria were defined as more than 3 prism diopters (PD) and 9 PD of exophoria at far and near fixation distances, respectively. Far esophoria was defined a...
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