Can reading in the dark damage your eyes and can you really lose contact lenses in your eyes? Find out the answers as the College of Optometrists is on hand to debunk a number of myths surrounding people's eyesight.
How much do you really know about eyesight? Like many things in life there are many myths and misconceptions surrounding vision.
Luckily the College of Optometrists as part of an ongoing campaign aimed at improving the eye health of children are on hand to separate the fact from the fiction. See how well you do in the myth busting challenge and remember no cheating!
Watching TV too much or too closely will damage your eyes
Watching too much TV or sitting very close to it may make your eyes tired or give you a headache – particularly if you are watching TV in the dark – but won’t cause any serious permanent damage.
Contact lenses can get lost behind your eyes
The membrane that covers the white of your eye (the conjunctiva) also lines your eyelids, so it is impossible for a contact lens to get lost behind your eyes.
Using your eyes too much can wear them out
Your eyes will last for your whole life if they are healthy or have conditions that are treatable. The health of your eyes has nothing to do with the number of hours you use them.
Reading in the dark or dim light will damage your eyes
Reading in dim light or in the dark is highly unlikely to cause any permanent damage to your eyes, but it could cause eye strain which can be uncomfortable. Your eyes adjust to the light around them and your pupils enlarge in order to collect the most light. We are designed to see detail better in the light so although you will not harm yourself by reading in the dark, it is more difficult to see and may cause a headache.
Masturbation makes you go blind
The only correlation between the two is that semen contains a large amount of zinc and a deficiency in zinc will cause a decline in a person’s vision. This is virtually impossible to achieve solely by masturbating.
Eating carrots will improve your eyesight
Carrots are a source of vitamin A, which is important for the eyes. However, before you embark on an all-carrot diet to improve your vision, note that it is more important for eye health to have a good balanced diet that supports your all-round health. Poor nutrition has been implicated in diseases such as age-related macular degeneration (AMD).
Answer: Some truth
Wearing someone else’s glasses may damage your eyes
Although you may not be able to see very well with them and may get a headache or double vision, you won’t come to any harm from wearing glasses that are not your prescription (unless you’re driving a motor vehicle).
Holding books up close will damage a child’s eyes
Where or how your child holds a book has no effect on the health of the eyes or the need for glasses. Sometimes children find it more comfortable to read close-up and their very good focusing ability makes it easy for them to do so.
You can sleep in your contact lenses
Unless you have been told specifically by your optometrist that you can sleep in your contact lenses, you should avoid this. Your eyes need to breathe whilst wearing contact lenses, and this is more difficult when your eyes are closed.
This – and the fact that when you are not blinking your contact lenses will not move on your eyes as much as when you are awake – can mean that you are at more risk of infection if you sleep in contact lenses. Always follow the guidelines given to you by your optometrist. If in doubt, take them out.