1.Acupressure measurement The purpose is to estimate IOP when IOP measurement cannot be performed using an IOP meter. The method of operation allows the patient to look down while the examiner places the tip of the index finger of both hands on the upper lid and alternately presses on the eyeball to estimate the level of IOP by the resistance sensation of fingertip touch. 2.Schiotz IOP meter examination method Purpose To assist in the diagnosis of glaucoma and to observe the effect of glaucoma treatment. Items preparation pressure trap IOP meter, sterilized large and small cotton swabs, ether, conversion table, epi-anesthetic (0.5% dicaine or lidocaine), antimicrobial eye drops. 3, non-contact IOP meter measurement method Purpose to assist in the diagnosis of glaucoma and to observe the effect of glaucoma treatment. Items Preparation Non-contact IOP meter.