will it cause any strain 4 the eye? has any1 with high power done it?? will it harm the retina or cause detachments etc?? CRT or corneal refractive therapy is a method use to temporary reshape the cornea to change the prescription. This method does have its limitations. It is not permanent. You have to wear retainer at night. This procedure is not cheap. My question to you is, why can you wear traditional contact lenses? People with high myopia have a higher risk of retina detachment (because of longer eyeballs) irregardless of whether he/she goes for lasik or not. Assuming your cornea thickness is suitable for lasik and you do get it done, you may need to go for further enhancement at a later stage. Common side effect of lasik is dry eye which can be rectify with eye drops. Here I'm also assuming your cornea therapy refers to lasik. | 