A ʻO ka tonometer ka mea maʻamau i haku ʻia me kahi mea hoʻololi hoʻololi kino, kahi ʻōnaehana ana ʻana o ka corneal deformation a i ʻole ka mea hoʻopili corneal a me kahi mea ʻike hoʻololi kaomi.Hoʻohana ʻia e ana i ke kaomi intraocular.ʻO nā huahana maʻamau tonometer, tonometer paʻa ʻole, tonometer paʻa lima, tonometer applanation, tonometer applanation, tonometer piezoelectric contact, tonometer rebound, tonometer Indentation, etc.. hiki iā ia ke kōkua i ka hōʻoia ʻana o ka cataracts, glaucoma a me nā maʻi maka ʻē aʻe.Hoʻohana mau ʻia ka tonometer non-contact i kēia manawa, nona nā pono o ka hana maʻalahi a me ke ana wikiwiki.