Robert Montés-Micó, Maria Nilsson, Rune Brautaset, Abinaya Priya Venkataraman, Alberto Domínguez-Vicent
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Abstract
Purpose: To evaluate the repeatability of a fully automated swept-source optical coherence tomography (SS-OCT) biometer to measure healthy crystalline lens decentration and tilt and their correlation with other biometric parameters.
Methods: In this prospective study, 135 eyes of 135 patients were included. Ocular biometric parameters including crystalline decentration and tilt were measured three times with the Eyestar 900 SS-OCT (Haag-Streit AG). The repeatability was analyzed with the within-subject standard deviation (Sw), coefficient of variability, and coefficient of repeatability. Other biometric parameters such as keratometry (K1 flat and K2 steep), anterior chamber depth (ACD), lens thickness (LT), and axial length (AL) were also analyzed to explore possible relationships.
Results: For K1, K2, ACD, LT, and AL, Sw values were 0.07 diopters (D), 0.14 D, 0.01 mm, 0.02 mm, and 0.01 mm, respectively. For X and Y decentration and tilt, Sw values were 0.01, 0.02, and 0.39 mm, respectively. The correlation coefficient (r) between the crystalline lens tilt was low (r < -0.300) for all ocular biometric parameters, and was only associated with the AL (P < .001, r = -0.295). The r value between the decentration along the X and Y direction and the ocular biometric parameters was in all cases lower than 0.300. There was only a correlation between the decentration (Y direction) and K2 and ACD parameters (P < .001, P = .007, respectively). The linear regression parameters resulted in a slope value lower than -0.15 between any direction of the decentration and the other ocular biometric parameters.
Conclusions: The Eyestar 900 provides repeatable measurements for crystalline lens decentration and tilt. AL was the only biometric parameter correlated with the crystalline lens tilt, and keratometry, ACD, and LT were correlated with the crystalline lens decentration along the Y direction. [J Refract Surg. 2025;41(2):e155-e163.].
期刊介绍：
The Journal of Refractive Surgery, the official journal of the International Society of Refractive Surgery, a partner of the American Academy of Ophthalmology, has been a monthly peer-reviewed forum for original research, review, and evaluation of refractive and lens-based surgical procedures for more than 30 years. Practical, clinically valuable articles provide readers with the most up-to-date information regarding advances in the field of refractive surgery. Begin to explore the Journal and all of its great benefits such as:
• Columns including “Translational Science,” “Surgical Techniques,” and “Biomechanics”
• Supplemental videos and materials available for many articles
• Access to current articles, as well as several years of archived content
• Articles posted online just 2 months after acceptance.
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