Shin-Nippon's LCD-900P serves refraction rooms in optometry practices and ophthalmology clinics that test vision at 2.0 to 7.0 m. Its main argument is variety. A 22-inch polarised LCD holds 38 test tables, including letters, numbers, and alphabets; children's optotypes; Landolt rings; Snellen charts; ETDRS charts; Bailey-Lovie tests; and the Haase Test Sequence, so one monitor covers the usual acuity work.
Ishihara colour vision tests sit among the same tables, which lets the examiner screen colour vision without changing equipment. Together, these tables let the examiner move from a distance acuity check to a colour vision screen within a single visit. Children's optotypes help with younger patients. Letters, numbers and alphabets suit adults reading in different scripts, and the choice is wide. Testing distance is set in 0.1 steps so that the display can match rooms of different lengths.
A remote control operates the monitor, allowing the examiner to change tables during the examination while staying free to watch the patient. The screen uses polarised LCD technology with a circular polarised system. Beyond the test tables, the monitor shows images and movies, either as a random slideshow or as video played from an external USB drive, so one screen can serve both the test room and the waiting area.
Power is supplied at 100 to 240 V, 50/60 Hz, so the input suits many mains supplies. The unit measures 590 × 390 × 50 mm and weighs 5 kg, which keeps a slim, light monitor easy to place in a busy refraction