Clinical comparison of the Welch Allyn SureSight™ handheld autorefractor vs. streak retinoscopy in dogs
Article first published online: 22 NOV 2012
© 2012 American College of Veterinary Ophthalmologists
Volume 16, Issue 5, pages 319–323, September 2013
How to Cite
Groth, A. D., Hollingsworth, S. R., Ofri, R., Kass, P. H., Reed, Z. and Murphy, C. J. (2013), Clinical comparison of the Welch Allyn SureSight™ handheld autorefractor vs. streak retinoscopy in dogs. Veterinary Ophthalmology, 16: 319–323. doi: 10.1111/j.1463-5224.2012.01075.x
- Issue published online: 2 SEP 2013
- Article first published online: 22 NOV 2012
- Research to Prevent Blindness
- NEI core grant. Grant Number: NEI P30EY12576
- National Science Foundation Office of Emerging Frontiers in Research and Innovation. Grant Number: EFRI 0937847
- Comparative Ophthalmic Research Laboratories
- donation by Pat Stoffers & family in memory of Sophie
- refractive error;
- streak retinoscopy;
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.