Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1985-05-02
1987-05-12
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351160R, 351176, A61B 300, G02C 704, G02C 702
Patent
active
046644903
ABSTRACT:
The invention concerns a contact lens for observation or treatment by irradiation of the eye, in particular the anterior chamber, outside of the optical axis of the eye. The contact lens comprises a Goldmann or Roussel lens having an entrance face which is flat or spherical, a spherical exit face which is applied to the cornea of the eye, a reflecting face and a compensating element, for example a plano-cylindrical lens. The compensating element is fixed on the reflecting face and its function is to create an astigmatism effect which is the reverse of that of the eye, for an incident light beam which enters by way of the entrance face. The contact lens permits highly accurate focusing of the beam on the apex inside the eye, which is particularly useful in ophthalmoscopy and ophthalmotherapy by means of a laser beam.
REFERENCES:
patent: 4067646 (1978-01-01), Nohda
patent: 4439026 (1984-03-01), Wilms
patent: 4506962 (1985-03-01), Roussel
patent: 4568157 (1986-02-01), Kurwa
patent: 4598984 (1986-07-01), Rol
Bovernick Rodney B.
Lasag AG
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