The Topcon LM-8 is a classic lens meter with an improved optical system and a LED illuminated target for glare-free viewing and fatigue-free operation. The technological harmony of high magnification optics and excellent wide field eyepiece make this possible. The LM-8 lensmeter is battery operated with LED-light.
The instrument also features a new cartridge type marking device and a re-designed eyepiece.
| Target | Topcon’s Original Cross Line Target | 
| Scale reading | Internal | 
| Vertex power scale | 0 to ± 25 diopters | 
| Vertex power scale graduation | 0.125D up to ± 5 D / 0.25D above ± 5D | 
| Prism diopter scale | 0 to 6 prism diopters 1 ∆ graduation | 
| Eyepiece adjustment | +3 to –5 diopters | 
| Lens diameter | 24mm to 90mm in diameter | 
| Tilt angle | 0 to 90 degree, freely adjustable | 
| Light source | LED 570 nm | 
| Power source | Battery operated (1.5V x 2) Auto shut off 5 min. |