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13 Cards in this Set
- Front
- Back
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Tonicity-adjusting agents |
NaCl KCl Dextrose Glycerin Propylene glycol |
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Viscosity-imparting agents = mucoadhesives |
Polyvinyl alcohol* Methylcellulose Hydroxypropyl methyl cellulose* Hydroxyethyl cellulose Carbomers
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Preservatives |
Benzalkonium chloride Polyquaterrnium (POLYQUAD®️) Thiomersal Methyl/ propyl paraben Phenylethanol Chlorhexidine Chlorobutanol |
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Examples of anti-oxidants |
Sodium bisulfite Sodium metasulfite Ascorbic acid Acetyl-cysteine Sodium thiosulfate
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Surfactant |
Polysorbate: Tween 20 Tween 80 |
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Surfactant |
Non-ionic SAA: •Polysorbate: Tween 20 Tween 80 |
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Insitu-forming gels classified according to triggering factors: |
•Temperature: Poloxamer Xyloglucan Ion (Ca++): Alginic acid Na alginate Gellan gum pH: CAP: cellulose acetate phthalate Lysozyme: Xanthan gum |
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Mucoadhesive thermosensitive in-Situ forming gels |
Contains mucoadhesive polymers as • Carbopol 940 • Hydroxypropylmethyl cellulose (HPMC). • Hydroxyethyl cellulose (HEC) |
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Classification of lenses by constructional materials |
Hard Soft hydrogel Rigid- Gas permeable (RGP) Hydrophilic silicone hydrogel materials |
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Hard contact lenses |
- PMMA: polymethylmethyl methacrylate - Plexiglas |
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Soft hydrogel |
Poly hydroxy ethyl methacrylate (HEMA) |
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Rigid- Gas permeable RGP |
Poly fluorosilicone acrylate |
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Hydrophilic silicone hydrogel materials |
HEMA and silicone |
