Long Sightedness Explained
Long sightedness, also known as hypermetropia, is when you can see clearly in the distance, but struggle to look clearly and comfortably at objects that are near.
What causes it?
There are two main types of hypermetropia, refractive hypermetropia or axial hypermetropia.Refractive hypermetropia is when the eye is too weak to make the image fall on the retina, where it needs to land to be able to see clearly. Instead the image falls behind the retina which makes is blurry and hard to see.
Axial hypermetropia is when the eye is too short, meaning the image again falls behind the retina and not on it.
Below shows where the light hits the retina in a normal eye, and then where it falls in a hypermetropic eye.
Almost all cases of hypermetropia can be corrected with the use of glasses or contact lenses. A convex lens, or plus powered lens would be used to correct the vision.
Another more permanent way of correcting hypermetropia is laser surgery. In this case the surgeon will use a laser to reshape the surface of the eye to make the light fall onto the retina, allowing the patient to see clearly without the use of glasses or contact lenses.
Have any concerns?
If you think that you or someone you know may suffer from myopia then feel free to get in contact and arrange an appointment at Opticare Opticians.
0141 332 8444