See lacrimal system.
L (Lacrimal Gland to Lens)
Covers the production and drainage of the tear fluid. Production takes place in the lacrimal (tear) gland situated under the lid in the upper temperoral position and the tears are swept across the eye by the action of the lid towards the lower nasal position where they flow into the nasal duct and down the inside of the nose.
Light amplification by simulated emission of radiation. As the high intensity light forms a narrow beam it can both vaporise and or fuse tissue making it a very useful tool not only in refractive surgery but also repairing the eye.
Laser in-situ Keratomileusis. Basically it combines both PRK and ALK. A corneal flap is lifted as in ALK (Automated Lamellar Keratoplasty) with the new exposed surface being lasered as in PRK (Photo-refractive Keratectomy). This procedure is generally replacing Lasek.