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Glaucoma: Overview01:25

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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RECURRENT FLOATERS AFTER LIMITED VITRECTOMY FOR VISION DEGRADING MYODESOPSIA.

Stefaniya K Boneva1,2,3, Justin H Nguyen1, Wei Gui1

  • 1VMR Institute for Vitreous Macula Retina, Huntington Beach, California.

Retina (Philadelphia, Pa.)
|March 20, 2023
PubMed
Summary

Recurrent floaters after vitrectomy are linked to new posterior vitreous detachment (PVD). Younger, myopic, phakic men are at higher risk. Consider inducing PVD during initial surgery to prevent recurrence.

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Area of Science:

  • Ophthalmology
  • Surgical Innovation
  • Patient Outcomes

Background:

  • Limited vitrectomy is used to treat vision-degrading myodesopsia (floaters).
  • The incidence and causes of recurrent floaters after this procedure are not well understood.
  • Identifying patients at risk for recurrent floaters is crucial for surgical planning.

Purpose of the Study:

  • To characterize patients experiencing recurrent floaters after limited vitrectomy.
  • To identify clinical risk factors associated with recurrent floaters.
  • To evaluate the role of new posterior vitreous detachment (PVD) in recurrence.

Main Methods:

  • Retrospective study of 286 eyes undergoing limited vitrectomy for myodesopsia.
  • Prospective assessment of contrast sensitivity (CS) and vitreous echodensity.
  • Analysis of preoperative and postoperative PVD status, patient demographics, and refractive error.

Main Results:

  • Recurrent floaters occurred in 14.1% of eyes without complete preoperative PVD.
  • New-onset PVD was identified in all recurrent cases.
  • Risk factors included younger age (<52 years), myopia (≥-3D), phakic status, and male sex.
  • Postoperative PVD led to a significant decline in CS.

Conclusions:

  • New-onset PVD is the cause of recurrent floaters post-vitrectomy.
  • Younger, myopic, phakic males are at increased risk.
  • Inducing surgical PVD during the primary vitrectomy may reduce recurrent floater incidence in at-risk patients.