[Keratoconus in a young patient with itching eyes and blurred vision].

Keratoconus is an asymmetric bilateral eye condition that results in an increase in corneal curvature and a decrease of corneal thickness. Increasing myopia and astigmatism result in a decrease of visual acuity. The condition frequently begins in the second decade, gets worse during the next few years, and stabilizes about age 35.

[A man with acute decline in vision and sleep apnoea].

Background: Non-arteritic anterior ischaemic optic neuropathy (NAION) is the most common acute optic neuropathy in people older than 50 years.

Case Description: A 66-year-old man with hypertension consulted the ophthalmologist because of increasing visual-field loss in his right eye; 3 weeks previously he had noticed visual decline in the same eye when he woke up. The eye was not painful.