How does intraocular surgery cause hyphema?

Updated: Jan 18, 2019
  • Author: David L Nash, MD; Chief Editor: Andrew A Dahl, MD, FACS  more...
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Answer

Answer

Hyphema can result from intraocular surgery, as follows:

  • Intraoperative bleeding: Ciliary body or iris injury may occur during a peripheral iridectomy, cataract extraction, cyclodialysis, canaloplasty, [12] and filtration procedure. It can also occur with laser peripheral iridectomy, more commonly with YAG laser than with argon laser, and argon laser trabeculoplasty (ALT). Hyphema is encountered during insertion of increasingly popular microstents with minimally invasive glaucoma surgeries (MIGS), as described by Hoeh et al with their experience with the CyPass Micro-Stent. [13]
  • Early postoperative bleeding: A traumatized uveal vessel that was in spasm and suddenly dilates or conjunctival bleeding that makes its way into the anterior chamber via a corneoscleral wound or sclerostomy
  • Late postoperative bleeding: New vessels growing across the corneoscleral wound that bleed when manipulated, a uveal wound that is reopened, or an intraocular lens (IOL) that causes chronic iris erosion (eg, UGH syndrome)

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