Spectral optical coherence tomography: a new imaging technique in contact lens practice.
OBJECTIVE
Spectral optical coherence tomography (SOCT) is a new non-invasive, non-contact, high-resolution technique, which provides cross-sectional images of objects that weakly absorb and scatter light. The aim of this article is to demonstrate the application of SOCT to imaging of eyes fitted with contact lenses.


METHODS
Nine eyes of six different subjects fitted with various contact lenses have been examined with a slit-lamp and a prototype SOCT instrument.


RESULTS
Our SOCT system provides high-resolution (4-6 mum longitudinal, 10 mum transversal) tomograms composed of 3000-5000 A-scans with acquisition time of 100-250 ms. The quality of the images is adequate for detailed evaluation of contact lens fit. Design, shape and lens edge position were assessed, and complications of contact lens wear could be visualized. Thickness of the lens, corneal epithelium and stroma as well as the space between the lens and the eye surface have been measured.


CONCLUSIONS
SOCT allows high-resolution, cross-sectional visualization of the eye fitted with a contact lens. The ability to carry out a detailed evaluation of the fitting relationship between the lens and the ocular surface might be useful in research and optometric practice. SOCT can also be helpful in diagnosis, evaluation and documentation of contact lens complications.
Kałuzny
Bartłomiej J
BJ
Department of Ophthalmology, Collegium Medicum, Nicolaus Copernicus University, Curie-Skłodowskiej 9, 85-094 Bydgoszcz, Poland. bartka@by.onet.pl
Kaluzny
Jakub J
JJ
Szkulmowska
Anna
A
Gorczyńska
Iwona
I
Szkulmowski
Maciej
M
Bajraszewski
Tomasz
T
Targowski
Piotr
P
Kowalczyk
Andrzej
A
D003261:Contact Lenses / Q000009:adverse effects; D003315:Cornea / Q000033:anatomy & histology; D003319:Corneal Stroma / Q000033:anatomy & histology; D003941:Diagnostic Techniques, Ophthalmological; D019573:Epithelium, Corneal / Q000033:anatomy & histology; D006801:Humans; D007634:Keratitis / Q000175:diagnosis / Q000209:etiology; D009907:Optometry / Q000379:methods; D017755:Prosthesis Fitting / Q000379:methods; D041623:Tomography, Optical Coherence / Q000379:methods*