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Pupil Size and LasikPupil Size and LasikPupil Size and the procedure of Lasik are related to each other. As the practice of laser vision correction has evolved, physicians have learned that there are numerous factors in delivering a superb visual result for our patients. The effect that the size of one’s pupil has on vision is one of many factors in how we see after the procedure.The aberration that is most directly related to pupil size is ‘spherical aberration’, which causes a ‘halo’ around lights at night when your pupils are at their largest. Spherical aberration is always increased when a nearsighted person is treated, because the central part of the cornea is flattened with the laser. Two very important factors besides pupil size in the quality of vision post-operatively are the amount of correction and the size of the treatment zone. When the pupils are small in size as they are generally during the day, most of the irregularities in the eyes are covered up. As the light decreases, the irregularities are exposed, which can cause haloes around lights to appear.
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