Mr. Ajay Pinate Profile

Ajay Pinate

at Carl Zeiss Vision International GmbH

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Proceedings Article | 20 May 2022 Presentation + Paper

Model eye assessment by 3D fast-scanning peripheral refraction wavefront sensor

Alejandro Calabuig-Barroso, Ajay Pinate, Nikolai Suchkov, Siegfried Wahl

Proceedings Volume 12136, 1213609 (2022) https://doi.org/10.1117/12.2621558

KEYWORDS: Eye, Refraction, Eye models, Relays, Telescopes, Mirrors, Wavefronts, Retina, 3D modeling, Wavefront sensors

Read Abstract +

Peripheral vision not only plays a vital role in daily visual tasks, such as locomotion and detection but there is also the hypothesis that peripheral refraction could influence eye growth and myopia development. In 1971 Hoogerheide et al. suggested an increased risk for humans to become myopic if the peripheral refractive errors tend to be hyperopic, i.e., positive relative peripheral refraction (RPR). The hypothetical link discovered between peripheral refraction and myopia development has opened a series of scientific investigations to confirm the theory and understand the underlying foundations. In this way, high-quality peripheral refractometry has gained importance in the study of myopia. Clinical aberrometers are efficient and robust instruments for measuring wavefront error for central vision; however, to measure aberrometry in the peripheral field, several difficulties arise that prevent standardization for clinical use. In the present work, we develop a new type of scanning aberrometer to improve and simplify the system for the analysis of peripheral refraction. Four physical eye models were made to provide a stable sample resembling a human eye and validate the new methodology. The purpose of this study is to investigate the characteristics of the current system to determine the factors that limit the employability of the instrument, and it is aimed at the development of the gold standard technology for peripheral refraction measurement, making the instrument more economical, simple to use and offering the highest possible measurement quality. The validation has been done by a comparative analysis between theoretical and experimental results showing good correlation. The results of this study will provide us with helpful information when conducting studies in human eyes using this new apparatus.

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