Posterior chamber phakic IOL sizing. Part I. A new algorithm of sulcus ciliaris diameter assessment using anterior segment optical coherence tomography

Офтальмохирургия. 2013;(3):31-35

 

Journal Homepage

Journal Title: Офтальмохирургия

ISSN: 0235-4160 (Print); 2312-4970 (Online)

Publisher: Publishing house "Ophthalmology"

Society/Institution: Russian Society of Ophthalmologists

LCC Subject Category: Medicine: Ophthalmology

Country of publisher: Russian Federation

Language of fulltext: Russian

Full-text formats available: PDF

 

AUTHORS


B.E. Malyugin (The S. Fyodorov Eye Microsurgery Federal State Institution, Moscow, Russia)

A.A. Shpak (The S. Fyodorov Eye Microsurgery Federal State Institution, Moscow)

D.G. Uzunyan (The S. Fyodorov Eye Microsurgery Federal State Institution, Moscow)

I.N. Shormaz (The S. Fyodorov Eye Microsurgery Federal State Institution, Moscow)

K.M. Patakhova (The S. Fyodorov Eye Microsurgery Federal State Institution, Moscow)

D.F. Pokrovskiy (The S. Fyodorov Eye Microsurgery Federal State Institution, Moscow)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 8 weeks

 

Abstract | Full Text

ABSTRACT Purpose. To study the effectiveness of a new algorithm in measurement of sulcus ciliaris diameter by the method of anterior segment optical coherence tomography (AS-OCT). Material and methods. Thirty two patients (32 eyes) with high myopia (age range: 19 to 50 years) underwent the comprehensive examination. Mean spherical equivalent (SE) in the study group averaged -13.12 D (range: -6.25 to -21.50 D). Mean axial length was 27.97±1.94mm (range: 24.26 to 31.64mm). Initially we analyzed in details the anatomy of anterior segment of each eye and measured precisely horizontal sulcus ciliaris diameter by the method of ultrasound bio-microscopy (UBM). After that the same parameter was assessed using the new AS-OCT measurement algorithm. Finally we compared UBM measurement results with the AS-OCT and evaluated intra-session intra- and inter-operator repeatability for the obtained AS-OCT data. Results. The UBM analysis of the anterior segment anatomy showed a correspondence of the peripheral iris pigment layer edge (IPE) to the lateral border of the sulcus ciliaris and gave proof of possibility of sulcus ciliaris diameter assessment using the AS-OCT. Mean sulcus ciliaris diameter values with UBM and AS-OCT were 12.35±0.47mm (range: 11.39 to 13.25mm) and 12.36±0.52mm (range: 11.40 to 13.35mm) respectively (P>0.05). Intra-session intra- and inter-operator repeatability did not exceed 0.17mm and 0.13mm respectively, while intra-individual coefficients of variation did not exceed 0.49% and 0.33% respectively. Conclusion. The new AS-OCT algorithm can be effectively used to assess sulcus ciliaris diameter with a high level of precision and repeatability. Application of this algorithm in posterior chamber phakic IOL sizing will be discussed in the next report.