Estimation of optic disc size using indirect biomicroscopy.
The use of the 90 dioptre fundus lens in conjunction with slit-lamp biomicroscopy as a method of estimating optic size was evaluated in a series of 37 patients. The measurements taken from the Haag-Streit slit-lamp were compared with values obtained planimetrically in order to assess a conversion factor and also the reliability of the method. This technique is a quick and easy method of obtaining an estimate of optic nerve head size in the clinic, but cannot replace more accurate methods of optic disc planimetry.
Glaucoma Unit, Moorfields Eye Hospital, London.
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Ruben
D006801:Humans; D009885:Ophthalmology / Q000379:methods; D009898:Optic Disk / Q000033:anatomy & histology*