104 pcs Optical Trial Lens Set Kit Metal Rim Aluminum Case

232 pcs Optical Trial Lens Set Kit Metal Rim Aluminum Case

The filament can be 360° rotated and move upward and downward. Astigmatism axis can be quickly and precisely measured. The light can be converged, radiated and paralleled. Brightness can be continuously adjusted. Recharging conveniently and quickly. Overcharge prevention protects the battery. Optional head of ophthalmoscope.

A Rim Trial Set, also known as a Trial Lens Set, is a collection of lenses mounted in metal or plastic rims used by opticians, optometrists, and ophthalmologists during refraction tests to determine a patient’s correct eyeglass prescription.

It is used together with a Trial Frame to test different lens powers directly on the patient’s eyes.

A Slit Lamp is a binocular microscope combined with a high-intensity adjustable light source, used by opticians and ophthalmologists to examine the anterior segment and sometimes the posterior segment of the eye in great detail.

A Vision Chart CP-5000 comprises rows of letters and is used by ophthalmologists, optometrists to estimate visual acuity. The Vision Chart CP-5000 is placed at a standardized distance (up to 5 meters) away from the person whose vision is being tested. The person then attempts to identify the symbols on the chart, starting with the larger symbols and continuing with progressively smaller symbols until the person cannot identify the symbols. The smallest symbols that can be reliably identified is considered the person's visual acuity. This visual acuity test device incorporates advanced Led back light technology that provides a standardized and more uniform illumination across the entire testing surface essential to reliable vision testing.