Objective Measurement Of The Imaging Quality Of Different Intraocular Lenses Using The Virtiol Device

Primary objective was the objective evaluation of the imaging quality of two different intraocular lenses using the VirtIOL device. Secondary objective was to determin the mesopic burst pattern size objectively.

The investigation was performed at JENVIS Research c/o Ernst Abbe University Jena in Germany in the year 2023.

An in vitro assessment of an monofocal and a trifocal IOL was performed using the VirtIOL. An industrial camera was mounted on the chin rest of the VirtIOL. The 1951 USAF chart was presented at following distances: 6 m, 1 m and 0.4 m after the alignment of the camera and the VirtIOL with an aperture fixed at 3 mm. The IOLs were each mounted in a model eye. The resolving power was determined for the setup for both test IOLs using the endpoint line pairs per mm by evaluating the captured images. The halo evaluation was performed using a pin LED presented at a distance of 6 m in dim light with an VirtIOL aperture of 4.5 mm. A descriptive analysis was performed.

The IOLs (monofocal/ trifocal) achieved within the VirtIOL in vitro setup a resolution of 1.00/ 0.63 lp/mm at a distance of 6m, as well as 0.79/ 0.79 lp/mm at an intermediate range of 1m. The measurement of resolving power at a near distance 0.4m resulted in 0.63/ 2.24 lp/mm. Following mean star burst pattern sizes were obtained for the monofocal and trifocal IOL: 5.56 cm and 14.06 cm at a distance of 6m.

The objectively measured resolving power using the VirtIOL in connection with an high resolution camera was as expected better in the distance with the monofocal IOL and better in the near for the trifocal IOL. The captured starburst pattern, was smaller for the monofocal IOL, while the trifocal IOL achieved an almost three times larger diameter. The work confirms the usability of the setup and represents a basis for further evaluations of intraocular lenses with the VirtIOL device.