Online course: Hypotony


Course Overview

Ocular hypotony can be defined as an intraocular pressure (IOP) less than 6 mmHg, which corresponds to more than three standard deviations below the mean. However, not all cases will develop symptoms with an IOP of 6 mmHg or less, while some eyes will develop symptoms even above this IOP. Patients may develop symptoms depending on scleral rigidity, axial length, lid pressure and eye rubbing.3 Therefore, hypotony should be defined as low pressure (whether acute, transient, chronic or permanent) which, in an individual eye, leads to functional and/or structural changes.

Postoperative hypotony can be divided into early (occurring within 4 weeks of surgery) and late (occurring more than 4 weeks after surgery).

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