Corneal thickness?

 I have read studies indicating that central corneal thickness is a risk factor for glaucoma. Studies show that the thinner the cornea, the higher the glaucoma risk  (for example, African Americans generally have thinner corneas). However, I have also read studies indicating that thinner corneas are a risk because they give falsely low readings on applanation tonometry. Therefore, I have the following questions:

1) Are thinner corneas a higher risk factor irrespective of giving falsely low readings?