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Using Both Eyes

Beginners often try to use just one eye when observing and squint the other eye closed.  You don’t have to do this – if you keep both eyes open, your brain will learn how to shut off image from the eye that you’re not using to observe.  If this still bothers you, you can keep both eyes open and cover your other eye with your hand, or use an eye patch.  Keeping one eye closed for a long time with your face muscles begins to hurt, and can give you a headache. :-(

 

Under this same category, you should also alternate which eye you’re using for observing.  One eye will get tired after an hour or so and by switching eyes, the views you’ll get will be fresh and clear.

 

Introduction to the Night Sky - Part I
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