Scientists found eye damage commonly occurs in the outer layer of the cornea, and inflammation in the eye's outer white and underlying layer. Researchers at the Tecnologico de Monterrey, Institute of Ophthalmology and Visual Sciences, in Mexico, analyzed the medical records of 233 women and 16 men diagnosed with Sjogren's syndrome. Nearly 40% (99) of the cases analyzed were people with primary Sjogren's syndrome, while the remaining 60% of the group was composed of people with secondary Sjogren's. The secondary group included 95 people with rheumatoid arthritis, 44 cases of people diagnosed with Lupus, and a few other autoimmune conditions. Eye tests for dry eyes (Schirmer I test, ocular surfacing training) found that nearly 46% of all cases had dry eyes and significantly less tear production. And as expected, people who suffered from the worst corneal damage had poor vision.