Figure 3From: Tono-Pen XL tonometry during application of a suction ring in rabbits Tono-Pen XL IOP versus suction ring vacuum pressure when incanulation manometry IOP is stable to 30 mmHg (A) and 60 mmHg (D). Tono-Pen XL error versus central corneal thickness when incanulation manometry is stable to 30 mmHg (B) and 60 mmHg (E). Tono-Pen XL readings mean values at 30 mmHg (C) and at 60 mmHg (F).Back to article page