Dopamine signaling and myopia development: What are the key challenges

Area of Science:

• Ophthalmology
• Neuroscience
• Genetics

Background:

• Myopia prevalence is rapidly increasing globally, necessitating new therapeutic strategies.
• Dopamine (DA) is a retinal neurotransmitter involved in visual development and refractive error.
• Outdoor activity is inversely correlated with myopia risk, potentially mediated by light-induced dopamine release.

Purpose of the Study:

• To critically review the role of dopamine in myopia development.
• To examine evidence supporting or refuting dopamine's role in light-induced myopia control.
• To evaluate the safety and translational challenges of dopamine-based myopia treatments.

Main Methods:

• Review of epidemiological and animal studies on myopia and dopamine.
• Analysis of research on extracellular retinal dopamine levels and dopamine receptors (D1 and D2).
• Examination of cellular and circuit pathways in the retina using pharmacological, transgenic, and visual environment approaches.

Main Results:

• Evidence suggests dopamine plays a causal role in myopia development.
• Dopamine receptors (D1 and D2) and retinal pathways are implicated in mediating light's effect on refractive development.
• Safety concerns and challenges exist in translating animal findings to human treatments.

Conclusions:

• Dopamine signaling is a critical target for myopia intervention.
• Further research is needed to overcome challenges in developing safe and effective dopamine-based myopia treatments for children.
• Translating basic science findings on dopamine to clinical applications remains a significant hurdle.