Astigmatism assessment

Astigmatism is slightly more complex to treat than myopia or hyperopia (short sightedness and long sightedness) because it requires correction in more than one plane.

In myopia and hyperopia, the eye consultant is subtly reshaping what is essentially a normal-shaped, spherical cornea. But an astigmatic cornea is shaped more like a rugby ball than the normal sphere. This creates a flattened cone shape at the front of the eye.

Light enters at different angles through this cone, creating two points of focus – and therefore a blurred image. This is what causes classic astigmatism symptoms such as blurred small print, difficulty reading, the inability to see both near and far without squinting, constant headache and fatigue.

The conical shape of the cornea means that the surgeon must take account of every distortion, in every direction. Although this is certainly more complex than standard myopia or hyperopia, virtually all astigmatism symptoms are treatable by an expert surgeon using the right technology and such cases are common practice at Circle Bath and Circle Reading.

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