title: Asteroid hyalosis affecting the choice of intraocular lens implant.
abstract: Asteroid hyalosis can create ultrasonic echoes capable of interfering with A-scan ultrasonic measurement of ocular length. Two cases are reported, one of which includes a measurement error necessitating a second implantation. Surgeons who entrust measurements to technicians should be aware of the measurement technique and should establish protocols that preclude such errors.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000150:complications* / Q000175:diagnosis; D005128:Eye Diseases / Q000150:complications / Q000175:diagnosis; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D014463:Ultrasonography; D014822:Vitreous Body