Night Vision Correction
Because of changes in the pupil size, the way that light moves through the eye is different in low, medium and high light level settings. For some patients this change in optical correction is quite small, but for others it can be significant, to the point that they see and perform better in low light settings with a specific correction.
This correction can be eye glasses, standard contact lenses with a different prescription power or ideally WaveTouch lenses which will have varied powers in different areas of the lens to provide the most accurate prescription in any lighting situation.
We measure our patients vision in different light conditions with the 3D Wave Aberrometer. This device measures the corneal curvature as well as the optical power across the entire pupil. This data is used for both eye glass and contact lens prescribing and can result in considerably better vision in all settings.
The image below shows how one of our patient’s optical power (and the correction needed to correct the vision properly) changes from 3mm (blue box) zone to the 5mm (red box) optical zones. The nearsighted correction changes from -6.75 to -7.75 and the astigmatism power changes from -1.00 to -1.50. This patient’s eye glass Rx had to be “blended” for routine use and she was fit with WaveTouch lenses for her best all around vision in all conditions.