Computer screen monitor optic relief device

• US 5,076,665 A
• Filed: 12/13/1989
• Issued: 12/31/1991
• Est. Priority Date: 12/13/1989
• Status: Expired due to Fees

• Current Assignee: Robert C. Mardian Jr
• Original Assignee: Robert C. Mardian Jr
• Inventors: Petersen, William L.
• Primary Examiner(s): Arnold, Bruce Y.
• Assistant Examiner(s): Phan, James
• Application Number:
  US07/450,613
• Time in Patent Office: 748 Days
• Field of Search: 350/286, 350/245, 350/144, 350/276 R, 350/452, 350/146, 350/143, 358/252, 351/175, 351/158, 351/203
• US Class Current: 359/809
• CPC Class Codes: G02C 5/045 for varying the horizontal distance of the lenses
• CPC Class Codes: G02C 7/14 Mirrors; Prisms
• CPC Class Codes: G06F 1/1609 to support filters or lenses

Abstract

An adjustable Pd lens frame carries a pair of prism lenses is adjustably positioned to a normal stationary position with respect to a computer monitor screen. The lenses provide "base in" for each eye and plus optical power to reduce both accommodative demand and convergence demand.

Claims

1. An optical device for use by any one of a plurality of operators at a computer work station to reduce eyestrain from viewing a monitor screen, while permitting the operator to view the keyboard and nearby objects with normal vision, said device comprising:

(a) an adjustable-Pd lens frame;

(b) a pair of prism lenses carried by said frame each of which provides a separate view of said screen to maintain stereopsis, said lenses being shaped and dimensioned to provide base in for each eye for reduction in convergence demand and plus optical power for reduction in accommodative demand; and

(c) a support independent of the operator'"'"'s body for adjustably positioning said frame vertically and axially with respect to said monitor screen to a normally fixed position relative to said screen.

2. A method for reducing eyestrain to any one of plurality of computer operators from viewing a computer monitor screen while permitting the operator to view the keyboard and nearby objects with normal vision, said method comprising inserting means between the operator'"'"'s eyes and the monitor screen for

(a) maintaining stereopsis and

(b) reducing both the convergence demand and the accommodation demand required for the operator'"'"'s eyes to focus on the monitor screen,

said means being adjustable independently of the operator'"'"'s body to a normally fixed position with respect to said screen and closer to the operator'"'"'s eyes than to said screen.