| 摘要 |
An indirect ophthalmoscopy lens system includes a contact lens device and a separate image erecting component. The contact lens device includes a first holder, a contact lens element having a concave posterior surface for placement on a cornea of a patient's eye and a first image forming lens system located anterior of the contact lens element and cooperating with the contact lens element for focussing light emanating from the retina of the patient's eye for forming a real, inverted, aerial image of the patient's retina anterior of the first image forming lens system. The first holder mounts the contact lens element and the first image forming lens system in a fixed relationship to one another. The image erecting component includes a second holder detached from the first holder and a second image forming lens system mounted within the second holder for receiving light rays forming the real inverted image anterior of the first image forming lens system for forming a real, re-inverted, aerial image of the patient's retina anterior of the second image forming lens system.
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