Instead of a scalpel or a laser, CK releases radio-frequency energy through a probe as thin as a strand of human hair, without cutting or removing tissue. After application of a numbing drop, radio-frequency energy is applied in a pattern to shrink small areas of corneal tissue. A circular shrinkage pattern can be used to create a band of constriction (like the tightening of a belt) in areas of the corneal that require tightening to help your vision improve. Other patterns are used for various corneal shape problems. Your surgeon may offer CK alone or in conjunction with other treatments.