Abstract: A portable slit-lamp apparatus, including a body (11) able to be held in the hand of an operator and a solid state lamp means (55) and associated optics (52) carried by the body for generating a narrow beam of light and projecting the beam onto the cornea of a patient s eye for reflection by structures of the eye, when the body is held at a suitable position in front of the eye. Means (22) is mounted in cooperation with the body and the solid state lamp means to detect a reflection of the narrow beam of light by structures of the eye and to make an image thereof, which image is, or is processable to provide, a digital record of the reflection.
Type:
Grant
Filed:
May 18, 2001
Date of Patent:
August 1, 2006
Assignee:
The Lions Eye Institute of Western Australia, Inc.
Inventors:
Kanagasingam Yogesan, Ian Jeffrey Constable, Gabriel Suplewski
Abstract: A method and apparatus for smoothing and homogenising the cross-sectional intensity distribution of the output from an excimer laser for improved application of excimer lasers to optical laser surgery to the cornea. The laser beam is focused by means of a cylindrical lens or mirror and then filtered using a narrow gap spatial filter to smooth the intensity distribution by removing high spatial frequencies. The resulting output beam may be collimated by means of a second cylindrical lens or mirror for application to further optical processes.
Type:
Grant
Filed:
April 23, 1991
Date of Patent:
July 19, 1994
Assignee:
Lions Eye Institute of Western Australia Inc.
Abstract: A method of making pigmented hydrophilic polymers in such a manner that the resulting polymers absorb ultraviolet and visible radiation, and that no migration, separation or leaching of the pigment can take place, is disclosed. The polymer compositions comprise blends of hydrophilic polymers with melanin pigments, the latter being synthesized on the hydrophilic polymer matrix. The disclosed polymer compositions are useful in the manufacture of ocular devices, particularly intraocular lenses and aphakic contact lenses capable of absorbing ultraviolet and visible radiation, at wavelengths between 300 and 700 nanometers, to the same extent as the natural crystalline lens of the eye. The disclosed method is also useful to impart photoprotective properties to the already made said ocular devices.
Type:
Grant
Filed:
December 7, 1989
Date of Patent:
October 12, 1993
Assignee:
Lions Eye Institute of Western Australia, Inc.
Inventors:
Traian V. Chirila, Ian J. Constable, Richard L. Cooper