Abstract
Purpose :
Recent monofocal intraocular lenses (IOL) innovations have been accompanied with an extension in depth of focus to provide functional vision at intermediate distances. However, this extended focus range is accompanied by a trade-off, as it diminishes image contrast at longer distances. A new monofocal plus IOL (enVista Aspire) from Bausch & Lomb has been developed to provide a continuous depth of focus from distance to intermediate with minimal compromise to distance vision. This laboratory study will compare through focus ETDRS images at far, 100 cm, and 80 cm between the enVista Aspire (EA), enVista monofocal (MX60E), and Tecnis Eyhance (DIB00) from Johnson & Johnson.
Methods :
The model eye used consists of a cornea, an intraocular lens holder, and a camera. The cornea is designed as per the ISO 1 aberration-free cornea. The test intraocular lenses can be placed in the holder and moved axially to bring the image to best focus at the retinal plane in which a camera is placed. This model eye is initially set up with a distance object in focus. Once the camera is set up with the best focus for distance, a visual acuity chart is placed at different distances from the model eye and images at intermediate distances are recorded.
Results :
Laboratory observations showed that the images obtained using the Aspire lens (EA) maintained high contrast at far and intermediate distances whereas the Eyhance lens (DIB00) had lower contrast at 100 cm. The monofocal control lens (MX60E) had the best contrast at distance (Figure 1).
Conclusions :
New monofocal plus IOLs are designed to improve the range of focus from distance to intermediate. The new enVista Aspire lens maintained the highest contrast from distance to 80 cm, while the Tecnis Eyhance lens showed a slight reduction in contrast at 100 cm.
This abstract was presented at the 2024 ARVO Annual Meeting, held in Seattle, WA, May 5-9, 2024.