Microneedles for advanced ocular drug delivery

Area of Science:

• Ophthalmology
• Biomaterials Science
• Drug Delivery Systems

Background:

• Topical eye drops have low bioavailability (<5%) for anterior segment diseases.
• Intraocular injections are invasive and have poor patient acceptance for posterior segment diseases.
• Current ocular drug delivery methods require frequent administration, highlighting an unmet need for sustained, localized delivery.

Purpose of the Study:

• To review microneedle systems for ocular drug delivery.
• To discuss the types of microneedles and therapeutics utilized.
• To identify challenges and opportunities for clinical translation of microneedle technology in ophthalmology.

Main Methods:

• Literature review of microneedle systems for ocular drug delivery.
• Analysis of microneedle types, therapeutic applications, and delivery mechanisms.
• Discussion of clinical translation challenges and future directions.

Main Results:

• Microneedles enable localized and sustained drug delivery to the eye.
• This approach enhances drug penetration through ocular barriers, improving therapeutic efficacy.
• Microneedles offer a minimally invasive alternative to intravitreal injections, potentially increasing patient acceptability.

Conclusions:

• Microneedle technology holds significant promise for advancing ocular drug delivery.
• Addressing current challenges is crucial for successful clinical translation.
• Further research and development are needed to optimize microneedle systems for widespread ophthalmic use.