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Bart Jaeken, Pablo Artal; Optical Quality of Emmetropic and Myopic Eyes in the Periphery Measured with
High-Angular Resolution. Invest. Ophthalmol. Vis. Sci. 2012;53(7):3405-3413. doi: https://doi.org/10.1167/iovs.11-8993.
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© ARVO (1962-2015); The Authors (2016-present)
On average, myopic eyes present a relative hyperopia in the peripheral retina. This has
been associated with the possibility that by modifying the peripheral refraction, the
progression of central myopia could be controlled. The authors explored how refractive
errors and optical aberrations interact in the formation of the retinal image in the
periphery, in eyes with different central refractions.
The authors used a fast and high-angular resolution scanning wavefront sensor to
measure the optical image quality of the eye in the horizontal meridian (± 40°) in 202
eyes of 101 subjects, 54 males and 47 females with an average age (std) of 27.5 (± 7.2)
years and an average foveal refraction (std) of −0.8 (± 1.3 D) of which 64 were
non-myopes (refraction ± std: 0.01 ± 0.46 D) and 37 myopes (−2.12 ± 1.08 D). They
evaluated the relationship between peripheral optical properties and central refraction
using different metrics.
The authors observed a significant tendency to a relative hyperopia in the periphery of
the myopic eyes. The relative peripheral refraction (RPR) was significantly different
between the emmetropic and myopic eyes from 15°–40° temporal retina and from 20°–40°
nasal retina. The mean RPR metric correlated with the central refraction of the subject
(r = −0.552 / −0.560 [OD / OS]). The image quality presented only
minor differences between the various refractive groups at angles of 30°–40° when the
central refraction was corrected.
Peripheral overall blur is mostly influenced by the interaction of defocus and oblique
astigmatism, and at larger eccentricities is similar for the different refractive
groups. This could argue against the hypothesis that a relative peripheral hyperopia
could drive eyes toward myopia.
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