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Intra-ocular lens optical changes resulting from the loading of dexamethasone
José M Artigas1,2, M Carmen García-Domene1,2, Amparo Navea1,3
1Fisabio Oftalmología Médica (FOM), Bifurcación Pío Baroja-General Avilés s/n, 46015 Valencia, Spain.
Biomedical Optics Express
|October 31, 2017
Summary
Loading hydrogel-silicone intraocular lenses (IOLs) with dexamethasone temporarily impairs optical quality, affecting modulation transfer function and spectral transmission. Optical properties largely recover after drug release.
Area of Science:
- Ophthalmology
- Materials Science
- Biomedical Engineering
Background:
- Intraocular lenses (IOLs) are crucial for vision restoration after cataract surgery.
- Drug-eluting IOLs offer potential for sustained intraocular drug delivery.
- Understanding the impact of drug loading on IOL optical performance is essential.
Purpose of the Study:
- To investigate the optical changes in hydrogel-silicone IOLs after loading with dexamethasone.
- To assess the reversibility of optical property changes post-drug release.
Main Methods:
- Prototype hydrogel-silicone IOLs were loaded with dexamethasone.
- Optical properties including modulation transfer function (MTF), spectral transmission, and diopter power were measured.
- Measurements were taken on drug-loaded, drug-released, and unloaded IOLs.
Main Results:
- Dexamethasone loading impaired the MTF and spectral transmission of hydrogel-silicone IOLs.
- Dioptric power remained unaffected by dexamethasone loading.
- Optical properties nearly recovered to baseline levels after the drug was released.
Conclusions:
- Loading hydrogel-silicone IOLs with dexamethasone causes temporary optical degradation.
- The observed optical changes are reversible upon drug release.
- These findings are important for the design of drug-eluting IOLs.
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