You can only truly appreciate the gift of sight until you lose it. Every eye disease needs to be treated immediately as eye is one of the most sensitive organs of the body. Glaucoma is a serious eye disease which can completely destroy your vision. The scariest thing about glaucoma is that, it cannot be treated easily. There are some definite signs of for this condition and you need to get immediate medical assistance if you think you have glaucoma.
If the clarity of your vision gets reduced even by a small fraction, our brain will detect it. If suddenly you are seeing blurred images, that might be due to a nerve damage. If you notice blurred vision visit an eye doctor immediately.