By Edward S. Bennett OD MSEd FAAO, Vinita Allee Henry OD

Designed for use as a short reference, this fourth variation of the Clinical guide of touch Lenses permits readers to simply locate the subject and data they want with no need to go looking via a whole bankruptcy to discover it.
Rigid gasoline permeable lens layout and becoming, smooth lens problem-solving, astigmatic administration, and bifocal correction are only many of the matters lined during this guide. every one bankruptcy comprises pattern instances to enhance and reveal the sensible nature of the subject, with nomograms and skillability checklists summarizing and emphasizing the real points.
With this advisor, scholars and practitioners could have a in charge source to assist healthy, overview, and troubleshoot any touch lenses, specially distinctiveness designs for years to come.
• Written by way of popular specialists within the box to assure accuracy of the data • New bankruptcy on becoming youngsters with touch lenses addresses an incredible progress area
·   New bankruptcy on scleral lenses
• Chapters at the medical administration of keratoconus, postsurgical becoming, orthokeratology, presbyopia, prolonged put on, and correction of astigmatism were significantly revised and updated
• Designed as a daily reduction to becoming; the logical format of instances permits quick access to information
• Instructor’s educating aids can be found as PowerPoint slides at the spouse website

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Cornea. 2001;20(6):610–618. Snyder C. Alleviating dryness in contact lens wear. Contact Lens Spectrum. 1998;13(8):35–40. Sorbara L, Talsky C. Contact lens wear in the dry eye patient: predicting success and achieving it. Can J Optom. 1988;50(4):234–241. Dillehay, SM, Miller MB. Performance of Lotrafilcon B silicone hydrogel contact lenses in experienced low-Dk/t daily lens wearers. Eye Contact Lens. 2007;33(6 Pt 1):272–277. Schafer J, Mitchell GL, Chalmers RL, et al. The stability of dryness symptoms after refitting with silicone hydrogel contact lenses over 3 years.

Lens surface treatments can also increase the on-eye wettability of soft lenses. Silicone hydrogel materials typically use surface treatments or internal wetting agents to improve wettability, thus providing another option for fitting the dry-eye patient. 57,58 Gas-Permeable Lens Selection GP lenses have the advantage of not dehydrating and obtaining water from the postlens tear film. However, they may induce peripheral corneal desiccation in patients with dry eye. If a GP lens is desired, a highly wettable material, such as a medium-oxygen-permeability (Dk) fluorosilicone acrylate, is recommended.

Lensometry reveals 2 prism diopters of base-out OD and OS. 50  170 20/20 Binocular testing reveals an intermittent alternating esotropia of 10 prism diopters with 2 prism diopters of base-out prism over each eye, she is able to fuse. Slit-lamp evaluation reveals good ocular health. Should this patient be fitted with contact lenses? SOLUTION: Because this patient requires lateral prism to prevent diplopia, contact lenses are not a good option. Even if her vision is correctable to 20/20 in each eye with contact lenses, she would require plano spectacles with the lateral prism to wear over her contact lenses.

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