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Clinical comparison of the Welch Allyn SureSight™ handheld autorefractor vs. streak retinoscopy in dogs
Author(s) -
Groth Allyson D.,
Hollingsworth Steven R.,
Ofri Ron,
Kass Philip H.,
Reed Zoe,
Murphy Christopher J.
Publication year - 2013
Publication title -
veterinary ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.594
H-Index - 50
eISSN - 1463-5224
pISSN - 1463-5216
DOI - 10.1111/j.1463-5224.2012.01075.x
Subject(s) - retinoscopy , cycloplegia , autorefractor , streak , dioptre , ophthalmology , refractive error , optometry , tropicamide , medicine , eye disease , visual acuity , optics , physics , pupil
Objective To compare the Welch Allyn SureSight™ wavefront autorefractor with retinoscopy in normal dogs. Animals studied Fifty privately owned dogs (100 eyes) of 20 breeds, free of ocular disease. Mean ± SD age: 5.7 ± 3.25 years (range: 6 months–13 years). Procedures The refractive error was determined in each eye by two experienced retinoscopists using streak retinoscopy as well as by an autorefractor operated by two different examiners. Measurements were performed before and approximately 30–45 min after cycloplegia was induced by cyclopentolate 0.5% and tropicamide 0.5% ophthalmic solutions. Results Mean ± SD noncyclopleged retinoscopy net sphere was −0.55 ± 1.14 (range: −3.75 to 3.5) diopters (D). Mean cyclopleged retinoscopy net sphere was −0.52 ± 1.18 (range: −4.25 to 2) D. Mean ± SD noncyclopleged autorefractor spherical equivalent (SE) was −0.42 ± 1.13 D (range: −3.36 to 2.73) D. Mean cyclopleged autorefractor SE was 0.10 ± 1.47 (range: −5.62 to 3.19) D. Noncyclopleged autorefraction results were not significantly different from streak retinoscopy (whether noncyclopleged or cyclopleged, P = 0.80 and P = 0.26, respectively). Cyclopleged autorefraction results were significantly different from noncyclopleged or cyclopleged streak retinoscopy ( P < 0.0001 in both states). There was no significant difference between noncyclopleged and cyclopleged streak retinoscopy ( P = 0.97). Conclusions Noncyclopleged autorefraction shows good agreement with streak retinoscopy in dogs and may be a useful clinical technique. Cycloplegia does not significantly affect streak retinoscopy results in dogs.