Occupational lead exposure and strabismus in offspring: a case-control study

Area of Science:

• Environmental Health
• Ophthalmology
• Pediatrics

Background:

• Strabismus, or eye misalignment, is a common pediatric condition.
• Parental occupational exposures are potential environmental risk factors for childhood diseases.

Purpose of the Study:

• To investigate the association between parental occupational lead exposure and the development of strabismus in children.
• To assess risks related to maternal and paternal lead exposure during critical developmental periods.

Main Methods:

• A population-based case-control study design was employed.
• Cases included 377 children diagnosed with nonrestrictive strabismus (1985-1986).
• Controls (n=377) were matched by age and hospital of birth; parental jobs were assessed for lead exposure from conception to 9 months postpartum.

Main Results:

• Maternal lead exposure showed a high, though not statistically significant, odds ratio (2.6) for esotropic strabismus.
• Paternal occupational lead exposure demonstrated a potential dose-response relationship, with moderate exposure yielding an odds ratio of 2.1 (95% CI 0.9-5.3) for esotropia.
• The overall association between paternal lead exposure and strabismus was suggested as weak.

Conclusions:

• The findings indicate a potential, albeit weak, association between paternal occupational lead exposure and childhood strabismus.
• Further research is warranted to confirm these findings and explore underlying mechanisms.
• Minimizing parental occupational lead exposure may be a relevant preventive strategy for strabismus.