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Customized Contact Lens Treatments for in-the-Eye Medication: Drug Delivery Through Contact Lenses |  | Author: James Fick
Publisher: VDM Verlag
Category: Book
List Price: $95.00
Buy New: $90.25
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You Save: $4.75 (5%)
New (8) Used (1) from $90.25
Seller: ---superbookdeals
Sales Rank: 5201343
Media: Paperback
Pages: 180
Number Of Items: 1
Shipping Weight (lbs): 0.7
Dimensions (in): 8.7 x 5.9 x 0.4
ISBN: 3639156129
Dewey Decimal Number: 660
EAN: 9783639156126
ASIN: 3639156129
Publication Date: May 26, 2009
Availability: Usually ships in 1-2 business days
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Product Description
Hydrophilic polymer (polymacon, alphafilcon-A) and silicone-based (balafilcon-A) hydrogel contact lenses, before and after surface modification by radio-frequency glow-discharge treatment (RFGDT), were used to monitor methylene blue/silver nitrate drug-surrogate uptake and elution. Infrared spectroscopy revealed modified absorption peaks, accordingly. Energy-dispersive x-ray (EDX) analysis and inductively coupled argon plasma atomic emission spectroscopy (ICP) confirmed silver lens depot concentrations and were employed to measured eluate concentrations, while visible spectrophotometry and ICP spectrometry monitored methylene blue and silver elution rates in static versus simulated eye-blinking conditions. The conclusions reached are that (1) initial drug uptake of surface modified lenses increased in this order: polymacon < alphafilcon-A < balafilcon-A lenses; (2) drug release rates of the polymacon, and alphafilcon-A remained unaffected by the RFGDT; (3) increased release rates occurred from the RFGDT-surface-modified balafilcon-A lenses; and (4) dynamic forces increased the release rates for all contact lenses.
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