I just got this camera accessory called the Hoodman HoodEYE. The Hoodman HoodEYE is designed for people who wear eyeglasses. It helps you get your eye close to the viewfinder without scratching your lenses and it helps keep out ambient light.
The rotating eyecup slides over your eyepiece mounting rails. The eyecup is made out of silicon rubber and completely covers your eye and DOES keep out light. The large eyecup also covers part of your LCD screen. You must tilt your camera slightly downwards to see the full screen, which is a minor nuisance.
I recommend this eyecup for bespectacled photographers. Check out the official Hoodman HoodEYE page here.
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