Hi,

Tonopen XL, Avia, Accutome , what they have in common? They are all contact tonometer . The only tonometer that measures through the Eyelid is the Diaton Tonometer, from Biacom, a prestige company now available for our customers.

Do not hesitate to contact us if you have any questions to [email protected] or call us (305) 731-2020.

Regards,

Optivision2020.com