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Interchangeability among five devices that measure anterior eye distances
Alberto Domínguez-Vicent1, Cari Pérez-Vives2, Teresa Ferrer-Blasco2
1Optometry Research Group (GIO), Optics Department, University of Valencia, Spain. alberto.vicent@uv.es.
Clinical & Experimental Optometry
|March 20, 2015
Summary
Interchangeability of devices for measuring anterior chamber depth (ACD) and white-to-white (WTW) distance was assessed. Pentacam HR, Orbscan II, and IOLMaster 500 are interchangeable for ACD, but not all devices are interchangeable for WTW distance.
Area of Science:
- Ophthalmology
- Optometry
- Biomedical Engineering
Background:
- Accurate measurement of ocular biometrics like anterior chamber depth (ACD) and white-to-white (WTW) distance is crucial for ophthalmic procedures.
- Various devices are available, but their interchangeability for these measurements requires careful evaluation.
Purpose of the Study:
- To assess the interchangeability of different devices used for measuring anterior chamber depth (ACD) and white-to-white (WTW) distance.
- To determine if measurements from devices like the Pentacam HR, Orbscan II, IOLMaster 500, Castroviejo surgical calliper, and CA-200F Corneal Analyser can be used interchangeably.
Main Methods:
- Eighty patients (aged 20-40 years) with refractive errors ranging from -4.25 to +1.00 D participated.
- Anterior chamber depth (ACD) and white-to-white (WTW) distance were measured using a Castroviejo surgical calliper, CA-200F Corneal Analyser, Orbscan II, Pentacam HR, and IOLMaster 500.
Main Results:
- Pentacam HR yielded significantly greater ACD measurements compared to other devices (p < 0.01), though differences were clinically acceptable.
- IOLMaster 500 and Orbscan II provided comparable ACD measurements (p > 0.01).
- For WTW distance, IOLMaster 500 gave the largest values and CA-200F Corneal Analyser the smallest (p < 0.01).
Conclusions:
- Pentacam HR, Orbscan II, and IOLMaster 500 are interchangeable for measuring anterior chamber depth (ACD).
- Orbscan II, IOLMaster 500, Castroviejo surgical calliper, and CA-200F Corneal Analyser are not interchangeable for measuring white-to-white (WTW) distance.
