The 90th anniversary of Maklakov's applanation tonometer.
D005901:Glaucoma / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007429:Intraocular Pressure; D012425:Russia (Pre-1917); D014065:Tonometry, Ocular / Q000266:history* / Q000295:instrumentation / Q000379:methods; D014586:USSR