After parental contentment, a buphthalmic blind eye of a 8-year-old patient was examined under general anaesthesia .The right eye was markedly greater, with corneal diameter of 15mm. The anterior chamber was punctureted in the corneal limbus and linked to a transducer and a reservoir with saline, which permitted intra-ocular pression variation. The initial iop was registered and then, modified between 12-52mmHg. Twelve measurements were done with Draeger tonometer. The manual opening of the eyelids resulted in a corresponding pressure peak, while during the use of Draeger’s tonometer there were no changes in the manometric registration.There was a positive linear correlation between the two methods of measurements here were no difference between the 12 iop measurements ( Wilcoxon, p=0.05).The differences between the two means was: Dragger – manometry = 0.75mmHg.As a conclusion, the Dragger tonometer was confiable for iop measurements in buphthalmic eyes.