| 摘要 |
<p>A system, and process for correcting presbyopia with the system including a tissue removal system that preferably includes a laser system (200) with means (206) for forming a predetermined presbyopia correction contour corresponding to a predetermined ablation profile through controlled ablation on an exposed corneal stroma area of the eye, such that a central zone (A) of about 1 mm to 3 mm or more preferably 1.4 mm to 1.8 mm is left intact with a main maximum presbyopia ablation zone (B) bordering the untouched or hardly touched (e.g., a radius transition edge) central zone. The annular maximum ablation zone in the stroma is defined by a smoothly curving, steep profile section which extends out from a central non-ablation zone section of the profile. Further outward from the maximum ablation zone in the stroma is an annular treatment zone that is determined by a further section of the presbyopia correcting profile generally represented by a smoothing transition section that extends into another zone which is an un-ablated zone.</p> |
