What are the pre-surgery eye measurements required for implants?
There are several eye measurements that a surgeon will take into consideration for your surgery.
1] The refraction (your glasses prescription)
2] The curve of the cornea
3] Measurements of the length of the eye (ultrasound)
These are all used to determine the best implant. In this region, some of these measures are come with extra charges. I always recommended these measurements be taken (even if a charge) because it does improve the accuracy of the final post-surgery glasses prescription (or lack thereof!).