Wearing contact lenses can affect glaucoma measurements

http://www.loyolamedicine.org/News/News_Releases/news_release_detail.cfm?var_news_release_id=973441662

[...]

Brenner and colleagues studied the effects of contact lens wear on retinal nerve fiber layer measurements, which ophthalmologists use to diagnose and manage glaucoma. The researchers found that in patients with lower refractive errors, better quality measurements were obtained without contact lenses in place. But in patients with higher refractive errors, wearing contact lenses could improve measurements. (A refractive error is an error in the way the eye focuses light.)

[...]

..