Photodisruption of the iridal tissue results in the formation of plasma, which propagates toward the endothelium. It is caused by molecules with an electron transition from low-energy orbital to higher (non-bounded) orbitals absorbing high-energy photons. Femtosecond lasers produce a different tissue interaction, however, known as photodisruption (Figure 1). Photoionizing (photodisruption) In Photoionization high-energy light (1064 nm) is deposited over a short interval to target tissue, stripping electrons from the molecules of that tissue which then rapidly expands, causing an acoustic shock wave that disrupts the treated tissue. Dry Eye after Small Incision Lenticule Extraction (SMILE) versus ... - PLOS PDF George Simellis, Ph.d. Photoablation occurs due to the action of an intense ultraviolet (UV) laser pulse that photochemically decomposes various cellular and extracellular components. This results in the breakage of long-chain tissue polymers into smaller volatile fragments. Letters, review articles, animal or laboratory studies, and conference . Retinal Photocoagulation: Overview, Preparation, Technique Method of laser photoablation of lenticular tissue for the correction of vision problems US20060217688A1 (en) 1991-11-06 . PPT - Introduction to Minor Surgical Procedures PowerPoint Presentation ... Cases were treated using a diode laser delivery system through either an operating microscope adapter (OMA) or a laser indirect ophthalmoscope (LIO) with a 20D lens. Optometry. This is a concise presentation for medical students (espec. Glaucoma 38. Photodisruption starts with a process called laser induced optical break-down (LIOB), which occurs when conditions of high frequency laser pulses are highly focused with short duration and applied through a small beam laser diameter . Laser-induced photodisruption has been widely used in laser ophthalmic surgery. Soft tissue photo-thermal ablation (or photovaporolysis) is a process of vaporization of intra- and extra-cellular water. A brief review of commercial applications of femtosecond lasers in a clinical setting with emphasis on applications to corneal surgery is presented. Different procedures have been used in refractive surgery which include photorefractive keratectomy (PRK), radical keratotomy (RK), laser-assisted in situ keratomileusis (LASIK), laser thermal keratoplasty (LTK), small incision lenticule extraction (SMILE) etc.4 Refractive surgeries with laser flap makers were approved by the United States Food and Drug Administration (FDA) in 1999 and .

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