a. A patient with a known history of stable and medically controlled
right glaucoma shows deterioration of his visual field despite normal intraocular
pressure as measured with a Goldman tonometer. He had had a right LASIK
performed 9 months earlier. Suggest two possible reasons for the deterioration
in relation to the LASIK procedure.
b. How may corneal astigmatism affect the intraocular pressure measurement
with a Goldman tonometer ?