Confocal laser method and device for measurement of optical properties of toric intraocular lenses

US10302528B2 · kind B2 · utility

Assignee

• The United States of America, as represented by the Secretary, Department of Health and Human Services · US

Inventors

• Ilko K. Ilev · Rockville, US
• Bennett N. Walker · Washington, US
• Robert Harold James · Gaithersburg, US
• Don Calogero · Montgomery Village, US

Key dates

• Filing date: Jan 27, 2016
• Grant date: May 28, 2019
• Expiry date: Jan 27, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M11/0228
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Described are systems, devices, and methods related to a confocal laser method (CLM) for accurately measuring dioptric powers and other critical optical properties of intraocular lenses (IOLs), such as toric IOLs. Described test results demonstrate that the described CLM systems and methods can be used to measure the spherical equivalent and cylinder powers of toric IOLs with high accuracy. Furthermore, some described systems include a rotating rectangular slit aperture that can be used for precise differentiation of the two focal planes and isolation of the two focal points, and thus, for accurate measurement of the anterior cylinder axis of toric IOLs.