| 摘要 |
Presbyopia and hyperopia are treated by increasing the amplitude of accommodation by increasing the effective working distance of the ciliary muscle. To this end, the sclera over the ciliary body is expanded by suturing thereto a relatively rigid band slightly larger than the sclera, surgical alloplasty, or by weakening the sclera by surgery or treatment with enzymes, heat or radiation, which then expands due to intraocular pressure. The scleral expansion band (102) comprises an anterior (108) and posterior (106) rim, and a web (104) extending between the rims. The band may be provided with one or more holes to assist in suturing. The same goal is achieved by shortening the zonules by application of heat or radiation or by surgery. Presbyopia is arrested by inhibiting the continued growth of the crystalline lens by application of heat, radiation or antimitotic drugs to the epithelium of the lens. Primary open angle glaucoma and/or ocular hypertension can be prevented and/or treated by increasing the effective working distance of the ciliary muscle. |
