Pediatric Conjunctivitis and Air Pollution Exposure: A Prospective Observational Study

Area of Science:

• Ophthalmology
• Environmental Health
• Pediatrics

Background:

• Unspecific conjunctivitis of unknown origin (UCUO) is a common ocular condition in children.
• The role of environmental factors, such as air pollution, in pediatric conjunctivitis is not fully understood.

Purpose of the Study:

• To determine the incidence and clinical characteristics of UCUO in pediatric patients.
• To investigate the association between UCUO and exposure to particulate matter (PM) air pollution.

Main Methods:

• A prospective study screened 251 pediatric patients with ocular surface inflammation.
• UCUO was diagnosed in 132 children based on specific criteria, excluding infection or allergy.
• Exposure to PM10 and PM2.5 was assessed based on residential addresses and air quality monitoring data.

Main Results:

• UCUO was diagnosed in 48 of 132 pediatric patients.
• Foreign body sensation and conjunctival hyperemia were the most frequent symptoms and signs.
• Significantly higher PM10 levels were observed in UCUO patients compared to controls (33.5±5.4µg/m3).
• The UCUO to total conjunctivitis ratio was higher in areas with greater exceedances of the EU legal limit for PM pollution.

Conclusions:

• A correlation exists between UCUO and exposure to air pollution in pediatric populations.
• UCUO is a notable condition in children and may be more prevalent in areas with higher air pollution levels.