Magnification-corrected indirect biomicroscopy of the optic nerve head

Abstract

Using the fundus lens correction factor (p), the clinician may be able to estimate the dimensions of optic nerve head features with sufficient accuracy to allow clinical decisions to be made in the evaluation of patients with diagnosed or suspected glaucoma.

Magnification characteristics of the Optical Coherence Tomograph STRATUS OCT 3000

“…Our results confirm previous findings (Ansari‐Shahrezaei et al. , 2001; Ansari‐Shahrezaei and Stur, 2002, 2005), using biomicroscopy, that eye magnification increases in hyperopic eyes compared with myopic eyes. On the other hand, it has been reported previously that magnification tends to increase with myopia when Heidelberg Retina Tomography is used (Tan et al.…”

Magnification-corrected photodynamic therapy

“…By means of a screw ruled in micrometers, the vitreous chamber depth can be precisely adjusted to produce axial ametropia. The essential dimensions of the model eye have already been published [3].…”

The effect of digital measurement software on photodynamic therapy

“…This study was divided in two parts: (1) to calculate the PDT treatment spot size obtained from a digital fundus imaging system [Heidelberg Retina Angiograph (HRA); Heidelberg Engineering, Heidelberg, Germany]; (2) to compare the results with the treatment laser spot size when using the Mainster Standard (Ocular Instruments, Bellevue, Wash.), Mainster Wide Field, Volk Transequator (Volk Optical, Mentor, Ohio) and Volk PDT Laser lenses at different axial lengths.…”

“…By means of a screw ruled in micrometres, the vitreous chamber depth can be precisely varied to produce axial ametropia. The essential dimensions of the model eye have already been published [2].…”