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Evaluation of central corneal thickness with low-coherence reflectometry, ultrasound and specular microscopy

Poster Details

First Author: R.Almeida PORTUGAL

Co Author(s):    J. Guilherme-Monteiro   L. Dias   S. Gouveia   H. Ferreira   M. Ruão   J. Salgado-Borges

Abstract Details


To assess the agreement between low-coherence reflectometry, specular microscopy and ultrasound measurements of central corneal thickness.


Ophthalmology Department of the Centro Hospitalar de Entre o Douro e Vouga, Santa Maria da Feira, Portugal.


Fifty eyes of 28 patients programmed for cataract surgery were evaluated with the contact ultrasound pachymeter OcuScan RxP®, specular microscope Tomey EM-3000® and optical biometer Lenstar LS 900®. Contact lens users and patients with corneal pathology were excluded.


Mean age were 71,6 ±7,94 years, ranging from 52 to 86 years. Pachymetry values of 540.5 ±31.19 ?m, 531.9 ±31.49 ?m e 541.1 ±32.63 ?m were obtained with the ultrasound, specular microscope and low-coherence reflectometry, respectively. Values were correlated (r >0.88) although those obtained with specular microscopy presented significant differences from those acquired with the other methods.


Present results show that central corneal thickness measurements obtained with ultrasound pachymetry, specular microscopy and low-coherence reflectometry are highly correlated but only one of the equipments can give other information of interest for implant and refractive surgery.

Financial Disclosure:


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