초록 ▼

In a preferred embodiment, a portable ophthalmoscope having low-power telescope elements and having an internal source of viewed-field illumination, relies on a patient\s focusing properties to inspect the fundus of the eye. A laser-beam source is flexibly coupled to the patient end of the ophthalmo

In a preferred embodiment, a portable ophthalmoscope having low-power telescope elements and having an internal source of viewed-field illumination, relies on a patient\s focusing properties to inspect the fundus of the eye. A laser-beam source is flexibly coupled to the patient end of the ophthalmoscope viewing axis and, after optical expansion and collimation, is folded into coincidence with the ophthalmoscope axis. A dichroic (filter) is the mirror via which the folding takes place, the filter being selected for a very narrowly limited spectral band of great attenuation of radiation at the characteristic wavelength of the involved laser, the latter having been selected for its photocoagulating and/or photoablating action on locally afflicted tissues of the retinal, choroid and/or other internal regions of the eye.

대표청구항 ▼

A portable indirect photocoagulation delivery system, comprising in combination, a hand-held ophthalmoscope including a low-power afocal telescope comprising a housing and optical elements that can be focused in the interior of an inspected eye, a light source carried by said housing and means inclu

A portable indirect photocoagulation delivery system, comprising in combination, a hand-held ophthalmoscope including a low-power afocal telescope comprising a housing and optical elements that can be focused in the interior of an inspected eye, a light source carried by said housing and means including a beam splitter on the telescope axis for projecting light over an illuminated central field region in the interior of the inspected eye; laser means having a radiation-beam output, means including an elongate flexible optical-fiber cable coupled at one end to said output, said housing having a side port and retaining the other end of said cable through said side port and directing cable output on a laser-radiation axis within said housing, means including a dichroic mirror carried by said housing and in the path of telescope viewing, optical means on the laser-radiation axis directing said laser-radiation axis to intersect the telescope axis at said dichroic mirror, a central normal to said mirror being inclined at one-half the included angle between the telescope axis and the laser-radiation axis, said optical means being such in conjunction with the refractive power of the inspected eye as to focus a single spot of laser radiation on the telescope axis and at a posterior region of the eye, centrally of the illuminated field of inspection, said optical means including an indexible carrier of lens elements of different corrective power, and means for selectively indexing said lens elements into and out of the laser-radiation axis for correctively offsetting refractive error of the inspected eye and for selecting a prospective laser coagulation of predetermined size on an internal structure of the inspected eye.