The posterior coats of the eye in glaucoma. An echobiometric study.

The axial length of the eye and the thickness of the posterior coats of the eye were measured sonographically in 50 eyes of 25 patients with glaucoma. From these data, the volume of the posterior half of the ocular coats was calculated. The intraocular pressure (IOP) of the patients varied between 10 and 69 mmHg. A negative correlation was found between the IOP and the ocular coat dimensions (thickness and volume, r = 0.5, P less than 0.05 and r = 0.6, P less than 0.005, respectively). The possible connection between elevated IOP and the choroidal circulation is also discussed.