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Blood reflux in Schlemm's canal. I. Normal findings
Archives of Ophthalmology (Chicago, Ill. : 1960)
|July 1, 1979
Summary
Blood reflux into Schlemm's canal occurs in normal eyes when conjunctival veins are blocked. This finding reveals the canal is not collapsed and supports circumferential flow under specific pressure conditions.
Area of Science:
- Ophthalmology
- Anatomy
- Physiology
Background:
- Schlemm's canal is a crucial part of the eye's drainage system.
- Understanding its normal function is vital for diagnosing and treating glaucoma.
Purpose of the Study:
- To investigate the possibility of blood reflux into Schlemm's canal in normal eyes.
- To determine if Schlemm's canal is partially collapsed in healthy eyes.
Main Methods:
- Occlusion of recipient veins in the conjunctiva and episclera.
- Observation of blood flow dynamics within Schlemm's canal.
Main Results:
- Blood reflux into Schlemm's canal was observed in normal eyes following vein occlusion.
- The anterior margin of Schlemm's canal became distinct, similar to observations in hypotony.
- Evidence suggests circumferential flow is possible within canal segments when a pressure gradient exists.
- The study found no evidence of partial collapse in Schlemm's canal in normal eyes.
Conclusions:
- Blood reflux into Schlemm's canal is a normal physiological event under specific conditions.
- Schlemm's canal maintains its patency in normal eyes.
- These findings contribute to a better understanding of aqueous humor outflow pathways.