High Myopia, Hypermetropia and Astigmatism
Myopia (short-sight), hypermetropia (long-sight) and astigmatism are all types of refractive error. This is when perfectly healthy eyes are either slightly too large (in the case of short-sightedness), or small (in the case of long-sightedness).
Astigmatism describes when there are different curvatures across the surface of the cornea, and can occur in conjunction with myopia or hypermetropia. When a prescription is over +/- 10 dioptres or the astigmatism is higher than around 4 dioptres, the prescription is regarded as ‘complex’.
In many cases, with the range of modern disposable contact lenses we have available to us nowadays, these prescriptions can be corrected with standard lenses. However in some cases these standard lenses do not provide sharp enough or stable enough vision and that’s where I can help. Lenses such as RGPs, custom-made soft lenses, large diameter RGPs and hybrid lenses can often provide much crisper vision, which remains stable all day with no variation on blink or movement. The fitting of such lenses is often slightly more involved than the fitting of disposable lenses, but the results are worth it.