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J Cataract Refract Surg. 2002 Sep;28(9):1655-66.

Clinical evaluation of refraction using a handheld wavefront autorefractor in young and adult patients.

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  • 1Department of Ophthalmology, University of Freiburg, Germany.

Abstract

PURPOSE:

To determine the accuracy of measurement by the SureSight autorefractor (software version 2.0) and the influence of accommodation.

SETTING:

Pediatric Section, Department of Ophthalmology, University of Hamburg, Hamburg, Germany.

METHODS:

In a series of comparative measurements, autorefractor readings were compared with cycloplegic retinoscopy in 195 eyes of 108 patients (1 to 81 years) measured under cycloplegia. Ninety-six eyes were also measured without cycloplegia.

RESULTS:

The wavefront autorefractor was able to refract human eyes from a distance of 0.35 m. The accuracy was lower than that with conventional tabletop autorefractors. A difference of less than 0.51 diopter (D) was found in 68% of the spherical equivalents under cycloplegia. Many emmetropic and hyperopic children accommodated during the noncycloplegic measurements and were minus-overcorrected up to -6.13 D. In our group of young patients (2 to 17 years), 47% were minus-overcorrected by more than -2.00 D.

CONCLUSIONS:

The wavefront autorefractor uses a new method to determine the refractive state of the eye from a distance. It was less accurate than other conventional autorefractors. A benefit is its application in infants and disabled and uncooperative subjects. Cycloplegia is necessary in young hyperopic patients.

PMID:
12231328
[PubMed - indexed for MEDLINE]
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