Mark L Mathis

US Patent:

20020058996, May 16, 2002

Filed:

Apr 9, 1997

Appl. No.:

08/827624

Inventors:

THOMAS A. SILVESTRINI - ALAMO CA, US
MARK L. MATHIS - FREMONT CA, US
JOHN A. SCHOLL - DANVILLE CA, US
ROBERT A. PROUDFOOT - SANTA CLARA CA, US

International Classification:

A61F002/14

US Classification:

623/005120

Abstract:

A device and method for refractive correction of the eye in order to improve the vision of the eye. The device is an intrastromal corneal ring (ICR) where the cone angle is varied according to the desired change in corneal refractive properties. The method involves the insertion of the ICR with appropriate cone angle for the desired change those properties.

US Patent:

56537522, Aug 5, 1997

Filed:

Feb 28, 1995

Appl. No.:

8/392910

Inventors:

Thomas Silvestrini - Alamo CA
Mark Mathis - Fremont CA
Bryan Loomas - Santa Clara CA

Assignee:

KeraVision, Inc. - Fremont CA

International Classification:

A61M 3100

US Classification:

623 5

Abstract:

The intrastromal corneal ring is adjustable in thickness and has an elongated, flexible, preferably transparent or translucent body which forms a circle. The intrastromal corneal ring is of a size such that it can be inserted into a human eye and is comprised of a material which is compatible with human ocular tissue. The thickness of the ring can be adjusted so that it is not necessary to stock a plurality of different rings of different sizes to be used in connection with a method of adjusting the shape of the cornea of the eye. A plurality of different embodiments of intrastromal corneal rings, including a spiral shaped intrastromal corneal ring, are disclosed each of which are adjustable in terms of their thickness. The thickness may be adjusted prior to the insertion of the intrastromal corneal ring into the cornea and may not be further adjustable after insertion. However, in accordance with preferred embodiments the intrastromal corneal ring is inserted at a thickness which is believed to be proper and may thereafter be further adjusted in order to precisely define the desired thickness and thereby more precisely adjust the shape of the cornea and focus the light entering the eye on the retina.

US Patent:

53237889, Jun 28, 1994

Filed:

Sep 21, 1992

Appl. No.:

7/948202

Inventors:

Thomas Silvestrini - Alamo CA
Mark Mathis - Fremont CA

Assignee:

Keravision - Santa Clara CA

International Classification:

A61F 900
A61F 214

US Classification:

128897

Abstract:

The intrastromal corneal ring (ICR) of the invention has a flexible, preferably circular body sized and configured such that it can be inserted into a human eye and comprised of a material which is compatible with human ocular tissue. The end portions of the circular body overlap each other and are formed in several different configurations or embodiments. The end portions are preferably configured such that when allowed to come together they intermesh and provide a ring with a smooth and continuous outer profile.

US Patent:

53001184, Apr 5, 1994

Filed:

Sep 21, 1992

Appl. No.:

7/948079

Inventors:

Thomas Silvestrini - Alamo CA
Mark Mathis - Fremont CA
Bryan Loomas - Santa Clara CA

Assignee:

Keravision - Santa Clara CA

International Classification:

A61M 3100

US Classification:

623 5

Abstract:

The intrastromal corneal ring (ICR) is adjustable in thickness and has an elongated, flexible, preferably transparent or translucent body which forms a circle. The ICR is of a size such that it can be inserted into a human eye and is comprised of a material which is compatible with human ocular tissue. The thickness of the ring can be adjusted so that it is not necessary to stock a plurality of different rings of different sizes to be used in connection with a method of adjusting the shape of the cornea of the eye. A plurality of different embodiments of ICRs are disclosed each of which are adjustable in terms of their thickness. The thickness may be adjusted prior to the insertion of the ICR into the cornea and may not be further adjustable after insertion. However, in accordance with preferred embodiments the ICR is inserted at a thickness which is believed to be proper and may thereafter be further adjusted in order to precisely define the desired thickness and thereby more precisely adjust the shape of the cornea and focus the light entering the eye on the retina.

US Patent:

56455828, Jul 8, 1997

Filed:

Feb 28, 1995

Appl. No.:

8/392911

Inventors:

Thomas Silvestrini - Alamo CA
Mark Mathis - Fremont CA

Assignee:

KeraVision, Inc. - Fremont CA

International Classification:

A61F 214

US Classification:

623 5

Abstract:

The intrastromal corneal ring (ICR) (47) of the invention has a flexible, preferably circular body sized and configured such that it can be inserted into a human eye and comprised of a material which is compatible with human ocular tissue. The end portions (48 and 49) of the circular body overlap each other and are formed in several different configurations or embodiments. The end portions (48 and 49) are preferably configured such that when allowed to come together they inter-mesh and provide a ring with a smooth and continuous outer profile.

US Patent:

56930925, Dec 2, 1997

Filed:

Jun 6, 1995

Appl. No.:

8/467708

Inventors:

Thomas Silvestrini - Alamo CA
Mark Mathis - Fremont CA
Bryan Loomas - Santa Clara CA

Assignee:

KeraVision, Inc. - Fremont CA

International Classification:

A61M 3100

US Classification:

623 5

Abstract:

The intrastromal corneal ring is adjustable in thickness and has an elongated, flexible, preferably transparent or translucent body which forms a circle. The intrastromal corneal ring is of a size such that it can be inserted into a human eye and is comprised of a material which is compatible with human ocular tissue. The thickness of the ring can be adjusted so that it is not necessary to stock a plurality of different rings of different sizes to be used in connection with a method of adjusting the shape of the cornea of the eye. A plurality of different embodiments of intrastromal corneal rings are disclosed each of which are adjustable in terms of their thickness. The thickness may be adjusted prior to the insertion of the intrastromal corneal ring into the cornea and may not be further adjustable after insertion. However, in accordance with preferred embodiments the intrastromal corneal ring is inserted at a thickness which is believed to be proper and may thereafter be further adjusted in order to precisely define the desired thickness and thereby more precisely adjust the shape of the cornea and focus the light entering the eye on the retina.

US Patent:

54662605, Nov 14, 1995

Filed:

Oct 22, 1993

Appl. No.:

8/141813

Inventors:

Thomas Silvestrini - Alamo CA
Mark Mathis - Fremont CA
Bryan Loomas - Santa Clara CA

Assignee:

KeraVision, Inc. - Fremont CA

International Classification:

A61M 3100

US Classification:

623 5

Abstract:

The intrastromal corneal ring (ICR) is adjustable in thickness and has an elongated, flexible, preferably transparent or translucent body which forms a circle. The ICR is of a size such that it can be inserted into a human eye and is comprised of a material which is compatible with human ocular tissue. The thickness of the ring can be adjusted so that it is not necessary to stock a plurality of different rings of different sizes to be used in connection with a method of adjusting the shape of the cornea of the eye. A plurality of different embodiments of ICRs are disclosed each of which are adjustable in terms of their thickness. The thickness may be adjusted prior to the insertion of the ICR into the cornea and may not be further adjustable after insertion. However, in accordance with preferred embodiments the ICR is inserted at a thickness which is believed to be proper and may thereafter be further adjusted in order to precisely define the desired thickness and thereby more precisely adjust the shape of the cornea and focus the light entering the eye on the retina.