Beautiful design and Attractive delicate. The conversion seat is aluminum in color (metallic).
Smoother operation in testing for myopia and astigmatism. 5-leaves spiral dish is made of hard Aluminum (high accuracy and good sensitivity) All the parts are well selected, reasonable assembly and user friendly.
The widest field of view per cross cylinder and rotary prism.
Unique mechanism in convergence system.
Widened Testing Range by auxiliary lenses provided.
Greater precision and durability. Gears are made of copper.
The associated chart projector, a wide range of visual function (binocular vision, stereopsis, aniseikonia).