OCULUS Pentacam Interpretation Guide

144
20.1 Case 1: Cylinder overcorrection from measurement of
keratometric astigmatism in an eye with WTRA
A 51-year-old woman underwent cataract extraction in OD. Her refraction was sph +4.00
cyl +0.75 A 100°. Axial length was 20.03 mm, and a +33.00 D toric Acrysof (Alcon, Fort Worth, TX)
was calculated for emmetropia. The Pentacam® detected a WTRA whose measurements at 3 mm
(Figure 170, Figure 171) yielded a 0.8 D difference between KA (1.4 D 110.8°) and TCRP astigmatism,
i.e. TCA (0.6 D 14.9°).
Figure 170: 1 Large Color Map showing keratometric astigmatism with a difference
between K1 and K2 of 1.4 D 110.8°
20 Total corneal astigmatism for toric IOL

OCULUS Pentacam Specifications

General

Measurement Time	Less than 2 seconds
Corneal Coverage	Up to 12 mm
Software	Pentacam Software
Data Transfer	USB
Corneal Topography	Yes
Display	External monitor required
Measurement Principle	Scheimpflug imaging
Camera	Rotating Scheimpflug camera
Light Source	Blue LED
Pachymetry	Yes
Anterior Chamber Analysis	Yes
Imaging Principle	Scheimpflug imaging
Fixation	Internal
Power Supply	100-240 V, 50/60 Hz
Resolution	High resolution
Lens Density Measurement	Yes
Dimensions	Varies depending on model and configuration
Weight	Varies by model, check manufacturer specifications
Number of Images	25 or 50