Findings indicate that implantation of monofocal add-on IOLs will not induce relevant additional disturbing glare compared with conventional pseudophakia.
Shack-Hartmann wave-front sensing has been successfully applied to many fields of optical testing including the human eye itself. We propose wave-front measurement for testing protective eye wear for production control and investigation of aberrations. Refractive power data is derived from the wave-front data and compared to a subjective measurement technique based on a focimeter. Additional image quality classification was performed with a multivariate model using objective parameters to resample a subjectively determined visual quality. Wave-front measurement advances optical testing of protective eye wear and may be used for objective quality control.
Purpose To build‐up an optomechanical eye model to reproduce physiological accommodation as a test environment for assessment of accommodative intraocular lenses (AIOL).
Methods Freshly enucleated porcine eyes were cleaned and glued into an expansion unit at ciliary body level. The cornea was removed using a trephine. After extraction of the crystalline lens with circular capsulorhexis an AIOL was implanted into the capsular bag. Finally, the posterior part of the globe was cut off and a vitrectomy was performed. The expansion unit with the dissected eye was placed in a temperature stabilized cuvette with BSS (35°C) simulating physiological conditions. The ciliary body is expanded to stretch or relax the zonula fibers effectuating pseudophakic accommodation. For a dynamic measurement of accommodation we used: 1) A Shack‐Hartmann‐Sensor for measuring optical performance. 2) An optical coherence tomograph (OCT) to measure the shape and relative lens position during accommodation.
Results The setup allows measurement of curvature, relative lens position, optical power and image quality of the IOL for different states of accommodation. Due to optical constraints, simultaneous measurement of 1) and 2) was not possible. Therefore, the cuvette was shifted between both beam paths for each measurement. Within the measurement area (5.5 x 5.5 x 1.6 mm in air) the OCT resolution is limited to 12 µm.
Conclusion The presented setup was considered to analyze the behavior of AIOL during accommodation in terms of change in curvature, position and optical performance. After experimental evaluation of the setup we will standardize and automate the measurement procedure, with the goal of a new AIOL design.
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