Abstract: Presbyopia is treated by a system using various lasers to remove a portion of the scleral tissue and increase the accommodation of the presbyopic patient's eye. Stable accommodation is achieved by the filling of the sub-conjunctiva tissue to the laser-ablated scleral areas. The proposed laser wavelength ranges from ultraviolet to infrared of (0.15-0.36) microns, (0.5-1.4) microns and (0.9-3.2) microns. Both scanning and fiber delivered systems are proposed to generate the ablation patterns. Laser ablation of the sclera may be conducted with or without opening the conjunctiva layer.

Abstract: Method and systems for customized two-step corneal reshaping using an elevation map and adjustable laser spot size are disclosed. System includes lasing crystals (Nd:YAG, Nd:YLF, Nd:YVO4, Er:YAG, Er:Cr:YSGG and Er:YSGG), nonlinear crystals (KTP, KDP, CDA, CBO, BBO and LBO), scanning optics and beam spot control means. Flash-lamp or diode-laser pumped lasers with output wavelength at UV (193 to 266 nm) and mid-IR (2.7 to 2.94 microns) are preferred. The customized ablation profile may be calibrated by PMMA based on the pre-operation profile and the calculated profiles for emmetropia.

Abstract: Method and systems for eye surgery for the treatment of presbyopia, ocular hypertension and glaucoma and other soft tissue surgeries are disclosed. System design parameters of lasing crystals (Nd:YAG, Nd:YLF, Er:YAG and Er:YSGG), nonlinear crystals (KTP, BBO, LBO), laser cavity configuration and energy delivery means are disclosed for diode-laser-pumped lasers with output wavelength at UV (263 or 266 nm), green (527 or 523 nm), and mid-IR (2.78 or 2.94 microns). Dual function of ablation and coagulation is proposed by a mode control means. The preferred diode-laser includes a wavelength at about 0.75 to 0.98 microns with power about 15 to 40 W and used in a side-pumping configuration to generate UV or IR having an energy per pulse about 3 to 30 mJ, power of about 0.1 to 1.5 W and operated at free running mode (IR laser) or pulsed mode (UV laser).

Abstract: Laser and non-laser means for selective thermal shrinkage of ocular tissue (including cornea, sclera, choroids and ciliary-body) for the treatment of hyperopia, presbyopia and glaucoma are disclosed. The preferred system includes lasers in visible (0.48 to 0.78 micron) and IR (1.4 to 2.2 micron), and non-laser device of radio frequency wave including electrode device, bipolar device and plasma-assisted device. Two predetermined treated area having a circle diameter of about (6 to 8) mm and about (10 to 14) mm are defined. A revised Beer's law is introduced, Bexp(?dA), to relate the focusing factor (B), penetration depth (d) and the absorption coefficient (A) at a given laser spectra. An optimal focal length about 0.8 to 1.4 times of (InB*)/A is formulated for lens design. The effective thermal penetration depth, d*=(0.3?1.0) mm, may be achieved by choosing an optimal focal length laser, or by the length of the conductor tip (about 0.45 to 1.2 mm) of the radio frequency device.

Abstract: The pharmacological means is to either “trigger” or enhance the contraction effect after a surgical method for larger accommodation and/or for more stable post-surgery results. The present invention also discloses the range of dose for both safety and effectiveness when it is used together with the surgical methods. The preferred embodiment for the surgical method to remove a portion of the soft tissue include lasers at wavelength of 0.19 to 0.36 um and 0.9 to 3.2 um and the non-laser device of radio frequency wave, electrode device, bipolar device and plasma assisted device. A deeper ablation depth of about 0.4 to 1.4 mm than the prior arts is disclosed. The preferred embodiment for pharmacological means includes the use of pilocarpine hydrochloride, phosphorothioate, physostigmine or other beta-adrenergic propanolamines.

Abstract: Presbyopia is treated by a system using various lasers to remove a portion of the scleral tissue and increase the accommodation of the presbyopic patient's eye. Stable accommodation is achieved by the filling of the sub-conjunctiva tissue to the laser-ablated scleral areas. The proposed laser wavelength ranges from ultraviolet to infrared of (0.15-0.36) microns, (0.5-1.4) microns and (0.9-3.2) microns. Both scanning and fiber delivered systems are proposed to generate the ablation patterns. Laser ablation of the sclera may be conducted with or without opening the conjunctiva layer.

Abstract: Surgical method and apparatus for presbyopia correction and glaucoma by laser removal of the sclera tissue are disclosed. The disclosed preferred embodiments of the system consists of a beam spot controller, an articulated arm and an attached end-piece. The basic laser beam includes UV laser having wavelength ranges of (0.19-0.36) microns, generated from UV excimer lasers of ArF, XeCl or solid state lasers of Nd:YLF, Nd:YAG, Ti:sapphire with harmonic generation using nonlinear crystals. Presbyopia is treated by ablation of the sclera tissue in predetermined patterns outside the limbus to increase the accommodation of the ciliary body of the eye. Glaucoma is treated by decreasing of intra ocular pressure of the laser surgery. A new concept based on a 2-component model is proposed and the accommodation increase is given by both lens thickness increase and its anterior shift.