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The influence of oblique viewing on axial and peripheral refraction for emmetropes and myopes.

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Title: The influence of oblique viewing on axial and peripheral refraction for emmetropes and myopes.
Authors: Mathur, Ankit, Atchison, David A., Kasthurirangan, Sanjeev, Dietz, Nadine A., Luong, Suzanna, Shih Pei Chin, Lin, Wen Linda, Sock Whay Hoo
Source: Ophthalmic & Physiological Optics. Mar2009, Vol. 29 Issue 2, p155-161. 7p. 2 Diagrams, 4 Graphs.
Subjects: Vision research, Myopia, Visual accommodation, Eye diseases, Eye movements, Eye abnormalities
Abstract: Refraction may be affected by the forces of lids and extraocular muscles when eye direction and head direction are not aligned (oblique viewing) which might potentially influence past findings on peripheral refraction of the eye. We investigated the effect of oblique viewing on axial and peripheral refraction. In a first experiment, cycloplegic axial refractions were determined when subjects’ heads were positioned to look straight-ahead through an open-view autorefractor and when the heads were rotated to the right or left by 30° with compensatory eye rotation (oblique viewing). Subjects were 16 young emmetropes (18–35 years), 22 young myopes (19–36 years) and 15 old emmetropes (45–60 years). In a second experiment, cycloplegic peripheral refraction measurements were taken out to ±34° horizontally from fixation while the subjects rotated their heads to match the peripheral refraction angles (eye in primary position with respect to the head) or the eyes were rotated with respect to the head (oblique viewing). Subjects were 10 emmetropes and 10 myopes. We did not find any significant changes in axial or peripheral refraction upon oblique viewing for any of the subject groups. In general for the range of horizontal angles used, it is not critical whether or not the eye is rotated with respect to the head during axial or peripheral refraction. [ABSTRACT FROM AUTHOR]
Copyright of Ophthalmic & Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: The influence of oblique viewing on axial and peripheral refraction for emmetropes and myopes.
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  Data: <searchLink fieldCode="AR" term="%22Mathur%2C+Ankit%22">Mathur, Ankit</searchLink><br /><searchLink fieldCode="AR" term="%22Atchison%2C+David+A%2E%22">Atchison, David A.</searchLink><br /><searchLink fieldCode="AR" term="%22Kasthurirangan%2C+Sanjeev%22">Kasthurirangan, Sanjeev</searchLink><br /><searchLink fieldCode="AR" term="%22Dietz%2C+Nadine+A%2E%22">Dietz, Nadine A.</searchLink><br /><searchLink fieldCode="AR" term="%22Luong%2C+Suzanna%22">Luong, Suzanna</searchLink><br /><searchLink fieldCode="AR" term="%22Shih+Pei+Chin%22">Shih Pei Chin</searchLink><br /><searchLink fieldCode="AR" term="%22Lin%2C+Wen+Linda%22">Lin, Wen Linda</searchLink><br /><searchLink fieldCode="AR" term="%22Sock+Whay+Hoo%22">Sock Whay Hoo</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Ophthalmic+%26+Physiological+Optics%22">Ophthalmic & Physiological Optics</searchLink>. Mar2009, Vol. 29 Issue 2, p155-161. 7p. 2 Diagrams, 4 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Vision+research%22">Vision research</searchLink><br /><searchLink fieldCode="DE" term="%22Myopia%22">Myopia</searchLink><br /><searchLink fieldCode="DE" term="%22Visual+accommodation%22">Visual accommodation</searchLink><br /><searchLink fieldCode="DE" term="%22Eye+diseases%22">Eye diseases</searchLink><br /><searchLink fieldCode="DE" term="%22Eye+movements%22">Eye movements</searchLink><br /><searchLink fieldCode="DE" term="%22Eye+abnormalities%22">Eye abnormalities</searchLink>
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  Data: Refraction may be affected by the forces of lids and extraocular muscles when eye direction and head direction are not aligned (oblique viewing) which might potentially influence past findings on peripheral refraction of the eye. We investigated the effect of oblique viewing on axial and peripheral refraction. In a first experiment, cycloplegic axial refractions were determined when subjects’ heads were positioned to look straight-ahead through an open-view autorefractor and when the heads were rotated to the right or left by 30° with compensatory eye rotation (oblique viewing). Subjects were 16 young emmetropes (18–35 years), 22 young myopes (19–36 years) and 15 old emmetropes (45–60 years). In a second experiment, cycloplegic peripheral refraction measurements were taken out to ±34° horizontally from fixation while the subjects rotated their heads to match the peripheral refraction angles (eye in primary position with respect to the head) or the eyes were rotated with respect to the head (oblique viewing). Subjects were 10 emmetropes and 10 myopes. We did not find any significant changes in axial or peripheral refraction upon oblique viewing for any of the subject groups. In general for the range of horizontal angles used, it is not critical whether or not the eye is rotated with respect to the head during axial or peripheral refraction. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Ophthalmic & Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Mar2009
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