Thanks for your question. Pupil size is an important parameter when considering Lasik surgery as the pupil is the primary determinant of how much light enters the eye.
Typically, it is important to know the pupil size in the dark-adapted eye (mesopic conditions) as that is the situation when the pupil is at its largest. If the mesopic pupil size routinely exceeds that of the Lasik treatment zone (effective optical zone), it is likely to result in possible optical distortions including glare, starbursts and haloes due to light entering the eye from around the edge of the optical zone.
Modern Lasik treatment zones usually vary between 6 - 6.5mm, which exceeds the majority of patients' mesopic pupil sizes. In rare instances when patient mesopic pupil sizes exceed the treatment zones, options include alternatives of choosing a larger Lasik ablation zones, surface ablation (Epi-Lasik) or an Implantable Collamer Lens.
There are certainly many options available so do discuss these in detail with your ophthalmologist, in particular with due consideration to your specific examination findings!
Best of luck!
ESG
