Two models of experimental myopia in the mouse

Area of Science:

• Ophthalmology
• Developmental Biology
• Animal Models

Background:

• Myopia, or nearsightedness, is a growing global health concern.
• Understanding the mechanisms of myopia development is crucial for effective intervention.
• Animal models are essential for studying ocular development and disease induction.

Purpose of the Study:

• To evaluate two distinct methods for inducing experimental myopia in mice: unilateral lid suture and -10D spectacle lens wear.
• To quantify the resulting changes in ocular axial length and refractive error.

Main Methods:

• Balb/cJ mice underwent either lid suture or wore a -10D spectacle lens from post-natal day 10.
• Control groups received a plano lens or no intervention.
• Axial length was measured using various techniques, including Optical Low Coherence Interferometry (OLCI).
• Refraction was assessed via streak retinoscopy, and optical modeling was performed using ZEMAX software.

Main Results:

• Both lid suture and spectacle lens wear significantly increased axial length (AL) in experimental eyes compared to controls.
• After 46 days, lid suture resulted in an AL of 3.592 mm versus 3.363 mm in controls (p<0.001).
• After 46 days, -10D spectacle lens wear increased AL to 3.721 mm versus 3.354 mm in controls (p<0.001).

Conclusions:

• Unilateral lid suture and -10D spectacle lens wear are effective methods for inducing experimental myopia in mice.
• These procedures lead to significant, measurable increases in ocular axial length.
• The findings support the use of these models for further myopia research.