The most serious eye diseases in Pointers are cataracts (appearing in young adulthood and usually progressing to blindness), and progressive retinal atrophy (always progressing to blindness). (yourpurebredpuppy.com)
The most serious eye disease in Mastiffs is progressive retinal atrophy (PRA), which can occur as early as 6 months old or as late as 3.5 years old, and which progresses slowly to complete blindness in middle age. (yourpurebredpuppy.com)
Organizations such as the Canadian Association of Optometrists say only doctors should be responsible for issuing medical aides (which it believes glasses and contacts are), and have expressed concern this change will lead to people skipping eye exams, which could delay the diagnosis of serious eye disease. (canadianbusiness.com)