A Non-Contact Tonometer (NCT) is an ophthalmic instrument used to measure intraocular pressure (IOP) the fluid pressure inside the eye without touching the ocular surface. Using a precisely controlled puff of air to briefly flatten the cornea, the NCT records the pressure required to achieve applanation and converts this into an IOP reading. Non-contact tonometry is the method of choice for routine glaucoma screening and IOP monitoring in clinics, hospitals, and eye camps, as it eliminates the need for anaesthetic eye drops, reduces the risk of cross-infection, and is significantly more comfortable for patients compared to contact-based alternatives.
