"The Smart Refractor RT-5100 comes with a smart, ergonomic design for patient comfort. It also has a smooth and quiet lens selection for faster examinations. For easier operation, it has a unique operator ""assist"" function. Comes with night mode and clear vision range check. The RT-5100 has a compact and ergonomic design which does not cover the patient's face and offers comfortable examination. It has a wide visual field of 40° which allows a natural view environment for the patient and enables a more realistic and accurate measurement. The night mode offers night-time visual acuity under low light condition and the 'Clear Vision Range Check' allows for clear vision range under correction in a graphical form based on measured values. "