Elevated intraocular pressure increases melatonin levels in the aqueous humour.
Alkozi Hanan, Sánchez-Naves Juan, de Lara Maria Jesús Perez, Carracedo Gonzalo, Fonseca Begoña, Martinez-Aguila Alejandro et al.
This study found that elevated intraocular pressure (IOP) in humans and glaucoma mice correlates with significantly increased melatonin levels in the aqueous humor, suggesting a potential biomarker or role in glaucoma pathology.