These traits causes development of anatomical deformities / deficiencies in the eye globe which causes a primary type of increased pressure within an eye. (dog-health-handbook.com)
If a lens luxates into a forward position it will cause an opacity of the central part of the cornea and will lead to an increase of pressure within the eye - glaucoma - which will cause clouding of the cornea, congestion and pain, ultimately leading to enlargement of the eyeball and total blindness. (thedogplace.org)
Glaucoma is described as an increase in pressure within the eye and if left untreated can cause irreversible damage to the optic nerve. (eyespecialistsforanimals.com)