Optometrist Amy Ogden explains Hypermetropia or Long SightednessHypermetropia (which actually, we shorten to hyperopia), occurs when either the cornea (the clear window that covers the iris) is too flat, or the eyeball itself is shorter than normal. This means, the light rays we need to be focussed at the retina, are instead focussed behind it.
What does this mean for the hyperopic person?Usually, unless the level of hyperopia is very high, distance objects are seen clearly, whereas near objects appear blurred. When we view an object up close, the lens in our eye changes shape. This increases its ability to bend light, this helps focus light from the near object onto the retina. For a person with small or medium amounts of hyperopia, the lens in the eye is able to change its shape to overcome some of the correction required when looking at a distant object. But it cannot change shape enough to provide the amount of focussing power needed for a near object. If levels of hyperopia are very high, then vision at all distances may appear blurred. This is because the lens cannot provide the focusing power required for either. Hyperopia is an eye focusing disorder (refractive disorder – it is not a disease).
SymptomsSymptoms of hyperopia are specific to a person, but the ones I see most commonly are;
- Difficulty with reading and computer work
- Headaches after prolonged near work, or when at school (but not at the weekends)
- Squinting to focus