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Slept with contact lenses. Blurry vision after waking up. Restored to normal after sometime. Matter of concern?

I have been wearing contacts and glasses for 30 years, I am 41. I fell asleep tonight for about a half an hour with my contacts in. When I woke up my vision was blurry so I removed my contact lenses and put my glasses on. My vision remained blurry and didn t restore to normal for 15 to 20 minutes. Should I be concerned?
Asked On : Sun, 24 Feb 2013
Answers:  2 Views:  2126
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Ophthalmologist 's  Response
Contact lenses, even the soft ones are not totally permeable to oxygen. the cornea being an avascular tissue gets its nourishment from the atmosphere. Hence, sleeping with contact lenses, the regular kinds used to correct refractive errors, causes hypoxia or a lack of oxygen to the cornea by acting as a physical barrier between it and the atmosphere. When this happens, the normal pump mechanism that nature provides us to keep the cornea clear and free of fluid does not function too well and the cornea swells or gets oedematous. What you would experience in such a situation would be blurred vision on opening your eyes and a dry sensation with difficulty in removal of contact lenses along with reduced sensations of the cornea. Fortunately, in most cases, where the cornea is healthy, once the lenses are removed and with the blinking action of the eyelids that act by massaging the cornea, the pump begins to work again and water is pushed out of the cornea renewing it to its former clear state. No harm done and back to normal. You are fine and no treatment is needed and you may resume wear of contact lenses keeping in mind that falling asleep with your contacts on is strongly advised against.
Answered: Sun, 24 Feb 2013
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Geriatrics Specialist Dr. Surendiran Gaj's  Response
hi there,
thanks for writing to us,
on leaving the contact lens as such,compression of the lens over cornea while closing the eyes,would have an blurry sensation for some time,it will be alright after removing the lens.
there is nothing to worry,so take the contact lens out,before going to bed.
if you have the repeated symptoms,its advisable to visit an opthamologist.
let me know if you have any questions.
thank you
Answered: Sun, 24 Feb 2013
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