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Experimental evaluation of ophthalmic devices and solutions using rabbit models
Liliana Werner1, Jesse Chew, Nick Mamalis
1John A. Moran Eye Center, University of Utah, Salt Lake City, UT, USA. liliana.werner@hsc.utah.edu
Veterinary Ophthalmology
|August 31, 2006
Summary
Rabbit eyes have larger anterior segment dimensions than human eyes, impacting intraocular lens (IOL) evaluation. Careful consideration of size differences is crucial for accurate ophthalmic device testing in rabbit models.
Area of Science:
- Ophthalmology
- Comparative Anatomy
- Biomedical Engineering
Background:
- Accurate anatomical measurements of the anterior segment are crucial for evaluating ophthalmic devices, particularly intraocular lenses (IOLs).
- Rabbit models are frequently used in preclinical studies for ophthalmic devices, but their anatomical relevance to humans requires thorough investigation.
Purpose of the Study:
- To compare the geometric dimensions of the anterior segment in rabbit and human eyes.
- To assess the suitability of rabbit models for evaluating ophthalmic devices, specifically IOLs.
Main Methods:
- Postmortem analysis of 15 rabbit and 15 human eyes using calipers and high-frequency ultrasound (Artemis).
- Measurements included anterior-posterior length, equatorial diameter, white-to-white distance, anterior chamber depth, anterior chamber and ciliary sulcus diameters, capsular bag diameter, and crystalline lens dimensions.
Main Results:
- Rabbit eyes, despite being smaller overall, exhibited significantly larger anterior segment dimensions compared to human eyes.
- Statistically significant differences (P < 0.0001 to P = 0.0003) were observed in anterior-posterior length, equatorial diameter, white-to-white measurements, anterior chamber diameter, ciliary sulcus diameter, and crystalline lens size.
Conclusions:
- The larger anterior segment dimensions in rabbit eyes necessitate size and design adaptations for evaluating phakic intraocular lenses (IOLs).
- Rabbit models remain valuable for preclinical testing of ophthalmic devices and solutions, particularly for pseudophakic IOLs implanted in the capsular bag.
