Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1991-04-15
1993-04-20
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351170, G02C 702
Patent
active
052047024
ABSTRACT:
Eye glasses in combination with a video display terminal and a process of eye glass prescription for workers utilizing video display terminals are disclosed. At least one diopter of base in (nasal or towards the nose) prism dioptric correction is utilized in combination with accommodation relaxing spherical prescription. This prism and sphere is superimposed upon normal eye prescription for accommodation and convergence of the eye at the working distance of the information display surface of the video display terminal. Preferred location of the lens center is exactly over the pupil of the eye when the eye views straight ahead in the orthophoric state or at the distance the screen will be viewed. There results an eye glass and eye glass prescription in combination with a video display terminal in which the patient viewing the video display terminal has both reduced and relaxed convergence and accommodation. The absence of eye strain due the accommodation reflex, panning over the positive spherical component of glasses, and loss of light from stopping down of the pupil is reduced. The eye glasses have preferred use with injection molded plastic lenses having the required sphere and prism molded into the lenses. In the preferred embodiment, the transparent plastic of the lenses is impregnated throughout with ultra violet and infrared filtering media and provided with anti reflective coatings on the lens surfaces.
REFERENCES:
patent: 5076665 (1991-12-01), Petersen
Bovernick Rodney B.
Dang Hung Xuan
RAMB, Inc.
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