Over-response or under-response to the treatment are all potential long-term complications of LASIK surgery. Over-response is when too much tissue is removed, while under-response means, not enough tissue was taken out during the procedure. Both over- and under-corrections are treatable once the eye heals and the refraction becomes stable. The need for retreatment (enhancement) is rare and at EyeSight Hawaii, unlike most other laser centers, there is no additional charge for these additional eye care procedures.