Optical Biometry

Article

Dr Paul-Rolf Preussner discusses how additional optical measurements are required to improve the accuracy limits in IOL calculation

Related Videos
Josefina Botta, MD, MSc, at ASCRS 2024
J. Morgan Micheletti, MD, speaks at the 2024 ASCRS meeting
Dr William Wiley of Cleveland Eye Clinic, Northeast Ohio
Related Content
A patient with a mask has closed eyes. Image credit: ©Ayman Alakhras – stock.adobe.com

Cataract surgery pre-treatment with miLoop: Shorter lensectomy time, less irrigation needed

April 6th 2024
Article

Investigators presented research on the pre-treatment outcomes during the 2024 ASCRS meeting

Three doors, green, orange and brown, with the numbers 1, 2 and 3 on them. Image created with Canva AI.

Evaluation of an enhanced monofocal intraocular lens

April 3rd 2024
Article

Three IOLs are evaluated in a randomised study

An illustration of an intraocular lens being inserted into the eye. Image credit: ©RFBSIP – stock.adobe.com

Focusing on functional vision with monofocal lenses

March 20th 2024
Article

Quantitative and qualitative improvement in IOL design

New research findings published in Optica indicate a new spiral lens could provide similar benefits to progressive lenses, with less visual distortion than those solutions currently on the market. The investigators’ findings, as described by Optica Publishing Group in a news release, demonstrate that the spiral diopter lens creates several separate points of focus within one lens.1 This structure provides the multifocal effect of a progressive lens, but with minimised distortion, the researchers reported. A spiral diopter lens could function in a contact lens or intraocular implant, and also boasts applications in imaging systems. The data comes out of Photonics, Numerical and Nanosciences Laboratory (LP2N), a joint research unit between the Institut d'Optique Graduate School, the University of Bordeaux and the CNRS in France. Investigator Bertrand Simon, PhD, an associate professor at Institut d’Optique, said the spiral shape has far-reaching implications, particularly for those with age-related farsightedness. “Unlike existing multifocal lenses, our lens performs well under a wide range of light conditions and maintains multifocality regardless of the size of the pupil,” Prof Simon said. The paper’s first author, Laurent Galinier from SPIRAL SAS in France, explained the lens structure as an “optical vortex,” which causes light to spin. In the news release, he stated the new lens “incorporates the elements necessary to make an optical vortex directly into its surface.” “Creating optical vortices is a thriving field of research, but our method simplifies the process, marking a significant advancement in the field of optics,” Galinier added. In Optica, Optica Publishing Group’s journal for high-impact research, the researchers describe the new lens, which they call the spiral diopter. Its spiraling features are arranged in a way that creates many separate points of focus — much like having multiple lenses in one. This makes it possible to see clearly at various distances. While developing the lens, the authors noted that image quality appears to be maintained at a satisfactory level with modification of aperture size. In addition, the structure of the optical vortex, and its number and position of focus points, could be changed by adjusting the topological charrge, or number or spirals around the centre axis.1 Future trials will document the performance of the spiral diopter lens in real-world conditions, including varying light levels. Further research is expected to illuminate potential applications including prescription eyeglasses, compact imaging systems and wearable devices. Reference Spiral-shaped lens provides clear vision at a range of distances and lighting conditions. News release. Optica Publishing Group. Accessed February 5, 2024.

Optica releases data on spiral diopter lens developed for multifocal vision correction

February 8th 2024
Article

The technology has potential for applications in contact lenses and intraocular implants

A pile of papers bound together with binder clips sits on a desk. Image credit: ©PaeGAG – stock.adobe.com

Case report: diversifying cataract outcomes

February 1st 2024
Article

Many options with one single Nd:YAG laser

A woman in a business suit shakes hands with a man in a lab coat as their colleagues converse behind them. Image credit: ©Chris Ryan/KOTO – stock.adobe.com

Rayner announces acquisition of Swiss Ophthalmology Innovation and Sophi phaco technology

January 17th 2024
Article

The UK-based Rayner announced the acquisition will enhance its portfolio in the cataract surgery space

© 2024 MJH Life Sciences

All rights reserved.