The trial lens set is an ophthalmology calculating apparatus used in hospital ophthalmology departments and eyeglasses shops to exam a patient’s refractive error - including hyperopia, myopia, presbyopia, astigmatism, strabismus or color blindness. It usually contains sphere lenses, cylinder lenses, prism lenses and other accessory lenses, etc.
Basic Information
Upgraded Version Trial Lenses - 104pcs
Metal Rim - Inner diameter 36mm, outer diameter 38mm
Wooden Tray - with labels and red velvet Portable
PU Leather Case - with combination lock
Single - side Hinge - lid can be propped at a specific angle
Gift - A Free Random PD Trial Frame
Hinge
Hinge allows the lid to hover at a specific angle before you want to close.
What's in the case?
Lens Functions
Spheres (72pcs)
Spherical lens includes concave lens (-) and convex lens (+). The former is used to correct myopia and the latter hyperopia and presbyopia.
Cylinders (24pcs)
Cylindrical lens consists of concave (-) and convex (+) cylindrical lens. They are used to correct astigmatism.
Prisms (2pcs)
The tangent plane of a prismatic lens is a cuneiform. This kind of lens is used to exam and correct strabismus or heterophoria, as well as to train eye muscles.