Description:
A set of ophthalmic trial spectacle lenses is intended for the selection of corrective glasses by the subjective test method. The set allows an ophthalmologist to determine with a sufficient degree of accuracy the necessary correction and the position of the main axes of the astigmatic eye, as well as to conduct other vision studies.
All sets are completed with a frame trial universal for lenses.
The set contains 266 iron-framed trial glass lenses.
Trial spectacle lenses have the following range:
- spherical - from ± 0.12 to ± 20 diopters
- cylindrical - from ± 0.25 to ± 6.00 diopters;
- Spectacle prisms - from 0.50 to 10.0 srad.
Frame:
- designed for the selection of complex glasses (for example, astigmatic, prismatic), as well as various ophthalmological examinations;
- provides accurate installation of lenses in the required position in front of the patient's eye, in relation to the individual structural features of his face and head;
- range of center-to-center distances from 48 to 76 mm.
- Spectacle prisms - from 0.50 to 10.0 srad.
Three lenses can be inserted into each lens holder with a diameter of 38 mm, in addition, on the opposite side of the lens holder there is a spring and stops into which one more lens can be inserted Lens holders can rotate freely with lenses inserted into them, which allows reading meridian angles according to the circular scales printed on the frame of the lens holder The frame has the ability to adjust the temporal length and interpupillary distance
