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Effect of accommodation on peripheral refraction in myopes and emmetropes using a COAS-HD VR open field aberrometer.
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).ORCID-id: 0000-0002-3745-0035
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
2016 (Engelska)Konferensbidrag, Poster (med eller utan abstract) (Refereegranskat)
Abstract [en]

Purpose To investigate the effect of accommodation on both central and peripheral refractive errors in myopes compared to emmetropes using a COAS-HD VR open field aberrometer. Methods 15 myopic subjects (-1.50 D to -8.25 D) and 14 emmetropic subjects (+0.75 D to -0.25 D) participated in this study. The mean age of the myopic group was 24.3 ± 5.7 years and for the emmetropic group was 23.9 ± 5.7 years. Central and peripheral refraction were measured with a COAS-HD VR open field instrument at seven different eccentricities from 0° to ± 30° in 10° steps for three different accommodative demands 0.33 D, 2.50 D and 4.0 D during monocular viewing. The myopic subjects were corrected with soft contact lenses and the measurements were performed on the right eye for a 3 mm pupil diameter for both groups. Relative peripheral refractive error (RPRE) was calculated for all three accommodative demands for both groups. Results Repeated measures ANOVA showed no significant difference in RPRE across eccentricities or between accommodation demands in the myopes (pÂż0.05). The myopic group had minimal hyperopic shift in the periphery for all three accommodative demands. The largest mean hyperopic shift was 0.37 D at 30° nasal retina for an accommodative demand of 4.0 D. On the other hand, the emmetropic group became relatively myopic at peripheral eccentricities, from 20° onwards for all three accommodative demands. The largest mean myopic shift was 1.01 D at 30° temporal retina for an accommodative demand of 2.50 D. Conclusion In the myopic group, we did not find any significant reduction in hyperopic shift in the periphery with accommodation. The emmetropic group showed myopic shift in the periphery for all three accommodative demands with temporal retina being more myopic than nasal retina.

Ort, förlag, år, upplaga, sidor
Optometry and Vision Science , 2016.
Nationell ämneskategori
Oftalmologi
Forskningsämne
Naturvetenskap, Optometri
Identifikatorer
URN: urn:nbn:se:lnu:diva-74466OAI: oai:DiVA.org:lnu-74466DiVA, id: diva2:1209279
Konferens
AAO Annual Meeting 2016, Anaheim, California, USA
Tillgänglig från: 2018-05-22 Skapad: 2018-05-22 Senast uppdaterad: 2018-12-07Bibliografiskt granskad

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Baskaran, KarthikeyanTheagarayan, Baskar

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Baskaran, KarthikeyanTheagarayan, Baskar
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Institutionen för medicin och optometri (MEO)
Oftalmologi

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