Checking is for intraocular pressure.

Organ vision is tone has, as here is intraocular pressure or IOP, as normal pressure is normal forms for eyes, as metabolism taking part , feeding eye, and optic function condition, where and today his checking with a different methods, and different indexes for norm, as orienting in these numbers will help a doctor, as his true pressure on 10 till 21 mm and indexes showng with tonography, pneumotonometer, and other special tonometres.
As with a checking tonometer Maklakov as spreading methods at hospital is in norm on 15-26 mm.
As patient lie, getting anaesthetic drops, tonometer cover with colour, as after put on cornea, as on his size display a light circle, when his diameter is back proportionally for a high of IOP, as his imprint put on the sheet, as check with a special tonometric line, but IOP changing within a day, are in norm they on 2-3 mm and rare on 4-6 mm, as usually OPS IS HIGHER ON A MORNING,THAN EVENING!Tonography is spreading method for checking IOP  as this method helps for check and production, as and eye liquid outflow, as here on an eye for 4 minutes apply special sensor, which registers right away are a few indexes.
But changing for IOP affecting a few factors, as rising pressure in eye are inclines, play on a wind instruments, high body temperature, hormonal changes, hyperthyreosis, menopause beginning, and drugs are hormones as leading also.