Myopia-What is Old and What is New?

Area of Science:

• Ophthalmology
• Public Health
• History of Medicine

Background:

• Myopia prevalence, particularly in East Asia, is linked to demanding education, extensive near work, and limited outdoor light exposure.
• Historical data from the 19th century reveals high myopia rates among European schoolchildren, correlating with educational levels and socioeconomic status.

Purpose of the Study:

• To explore historical perspectives on myopia development and control, drawing parallels with contemporary research.
• To highlight Hermann Cohn's early observations and proposed interventions for myopia management.

Main Methods:

• Review of historical medical literature, specifically Hermann Cohn's 19th-century research on myopia.
• Comparison of historical findings with modern myopia control strategies, including light exposure, optical corrections, and pharmacological interventions.

Main Results:

• Hermann Cohn identified low luminance during near work as a factor promoting myopia and suggested specific illuminance levels for classrooms.
• Cohn proposed strategies such as controlling reading distances, limiting reading duration, and choosing less visually demanding professions.
• He also investigated atropine for myopia but found its side effects less favorable than reduced reading time.

Conclusions:

• Many of Hermann Cohn's early findings on myopia etiology and management have been corroborated by modern research.
• While contemporary understanding and data are more robust, historical insights into myopia control remain valuable.
• The study underscores the enduring relevance of environmental factors like light exposure and visual behavior in myopia progression.