What Researchers Did
Researchers investigated how transcorneal and systemic oxygen delivery affects intraocular oxygen levels in rabbits, monkeys, and a small number of human volunteers and patients.
What They Found
Delivering 100% oxygen to the cornea significantly increased aqueous humor pO2 in rabbits and monkeys, and hyperbaric 100% oxygen also raised preretinal vitreous pO2 in monkeys. This increased oxygen prevented sickling of human sickle hemoglobin erythrocytes, though no iris vasculature constriction was observed in two human volunteers or four patients with rubeosis iridis.
What This Means for Canadian Patients
Oxygen therapy, delivered directly to the eye or systemically, could potentially offer a new treatment approach for conditions like sickle cell hyphema or ischemic diseases affecting the front or inner retina. This could help Canadian patients by providing non-invasive or minimally invasive options to prevent cell sickling or improve oxygen supply to oxygen-deprived eye tissues.
Canadian Relevance
This study has no direct Canadian connection as it was not conducted in Canada, nor did it involve Canadian researchers or patients.
Study Limitations
A significant limitation is the reliance on animal models and the very small number of human participants, limiting the generalizability of the findings to a broader human population.