| 摘要 |
<p>Thermokeratoplasty is applied to achieve a customized reshaping of a cornea, especially, for the treatment of astigmatism. Energy is applied to the cornea in a customized pattern using a specific configuration of two conductors. In one embodiment, an outer conductor and an outer conductor are separated by a gap. When a conducting element is applied to the corneal surface the area of the cornea at the periphery of the inner conductor is subject to an energy pattern with substantially the same shape and dimension as the gap between the inner and outer conductors. The inner and outer conductors may be positioned and shaped to form a gap having any desirable size and/or shape, including non-annular and asymmetrical shapes. The gap may be configured by altering the spatial relationships between the inner conductor and the outer conductor, by altering the size, shape, and/or position of the inner and/or outer conductors, or by forming one or more indentations or protrusions in or on the inner conductor and/or the outer conductor. Additionally or alternatively, energy is applied to the cornea in a customized pattern defined by a specific arrangement of one or more dielectric materials providing varying impedance.</p> |
