Erroneous automated refraction in a case of asteroid hyalosis.
To our knowledge, this is the first report of asteroid hyalosis giving rise to spurious automated refraction readings. A patient with asteroid hyalosis had uneventful phacoemulsification with intraocular lens implantation. Using a Nikon autorefractor, the postoperative refraction was +13.0 diopters (D); retinoscopy revealed that it should be +1.0 D. Asteroid hyalosis changes the optical quality of the vitreous and can cause an incorrect reading from automated equipment such as autorefractors and A-scan ultrasound scanners. In patients with asteroid hyalosis, results from autorefractors should be viewed in conjunction with clinical findings.
Wong
S C K
SC
Eye Department, Leicester Royal Infirmary, Leicester, United Kingdom.
Sampath
R
R
D000368:Aged; D000369:Aged, 80 and over; D001331:Automation; D003951:Diagnostic Errors; D003941:Diagnostic Techniques, Ophthalmological; D005128:Eye Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D012029:Refraction, Ocular