Clinical evaluation of refraction using a handheld wavefront autorefractor in young and adult patients
| Autor: | Thilo Schimitzek, Wolfgang Wesemann |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Adult
Mydriatics medicine.medical_specialty Refractive error Adolescent genetic structures Emmetropia Refraction Ocular Vision disorder medicine Humans Child Retinoscopy Dioptre Aged Aged 80 and over medicine.diagnostic_test business.industry Accommodation Ocular Infant Cycloplegia Middle Aged Models Theoretical Refractive Errors medicine.disease eye diseases Sensory Systems Surgery Ophthalmology Autorefractor Child Preschool Optometry medicine.symptom business Accommodation |
| Zdroj: | Journal of Cataract and Refractive Surgery. 28:1655-1666 |
| ISSN: | 0886-3350 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|