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J. Pepose, A. Glasser, M. Qazi, I. Cox, S. Kasthurirangan, D. Win–Hall; Objective Accommodation Measurements in Patients With Scleral Expansion Segments . Invest. Ophthalmol. Vis. Sci. 2006;47(13):5849.
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© ARVO (1962-2015); The Authors (2016-present)
To measure accommodation subjectively and objectively in scleral expansion segment (SES) patients.
In 5 SES subjects and 5 control patients, accommodation was measured objectively with a Grand–Seiko WR5100K autorefractor and a modified COAS wavefront aberrometer, while patients fixated upon an adjustable near stimulus. Autorefractor and wavefront–based results were compared to accommodative amplitude measured using a push ("subjective") technique.
Similar robust accommodative responses (maximum responses ranging from +4.12 to +4.76D) were recorded with both instruments in young control subjects (mean difference ± SD of 0.16 ± 0.59 D). Objective/subjective accommodation in the presbyopic control eyes was 0.03 ± 0.15D/2.54 ± 1.05D and –0.03 ± 0.13D/2.59 ± 1.36D in the SEB eyes. Through–focus analysis following application of pilocarpine 4% showed a peak in the Strehl ratio at –0.50 D (ratio=0.112) for SES eyes and –0.75 D (ratio=0.094) for contralateral non–SES eyes.
SES eyes had similar objective and subjective accommodation as measured in presbyopic non–SES control patients. There is no objective evidence of restoration of accommodation with SES in the patients tested.
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