The set of ophthalmologic trial eyeglass lenses is intended for selection of corrective points by method of subjective test. The set allows the ophthalmologist at selection of points with sufficient degree of accuracy to define necessary correction and the provision of the main axes of an astigmatic eye, and also to conduct other researches of sight.
All sets are completed with a frame trial universal for lenses.
The set consists of 266 trial glass eyeglass lenses in an iron frame.
Trial eyeglass lenses have the following range:
- spherical - from ± 0,12 to ±20 dptr
- cylindrical - from ± 0,25 to ± 6,00 dptr;
- prisms-point - from 0,50 to 10,0 srad.

Frame:
- it is intended for selection of difficult points (for example, astigmatic, prismatic), and also different ophthalmologic researches;
- provides exact installation of lenses in necessary situation before the patient's eye, in relation to specific features of a structure of his face and head;
- range of intercenter distances is from 48 to 76 mm.
- prisms-point - from 0,50 to 10,0 srad.

In everyone the linzoderzhatel, with a diameter of 38 mm can be inserted at the same time on three lenses, besides, from the opposite side of a linzoderzhatel there are a spring and an emphasis into which it is possible freely insert one more lens of Linzoderzhateli can rotate with the lenses inserted into them that allows to reckon the meridialny corners on circular scales put on a frame of a linzoderzhatel the Frame has a possibility of regulation of temporal length and interpupillary distance