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Related Concept Videos

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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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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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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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Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Post-trabeculectomy ocular biometric changes.

Mohammad Pakravan1, Azam Alvani1, Hamed Esfandiari1

  • 1Ophthalmic Epidemiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Clinical & Experimental Optometry
|October 1, 2016
PubMed
Summary
This summary is machine-generated.

Trabeculectomy surgery alters eye measurements, impacting future lens calculations. Using non-contact methods and delaying cataract surgery can improve accuracy after glaucoma procedures.

Keywords:
anterior chamber depthaxial lengthchoroidal thicknesskeratometrylens thicknesstrabeculectomy

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Area of Science:

  • Ophthalmology
  • Ocular Surgery
  • Biometry

Background:

  • Trabeculectomy is a common glaucoma surgery.
  • Glaucoma management significantly impacts ocular biometry.
  • Post-operative biometric changes are critical for patient outcomes.

Purpose of the Study:

  • To analyze the impact of trabeculectomy on ocular biometry.
  • To evaluate the effect of these changes on intraocular lens power calculation.
  • To suggest methods for reducing calculation errors.

Main Methods:

  • Review of post-trabeculectomy ocular biometric data.
  • Analysis of changes in axial length, anterior chamber depth, lens thickness, and choroidal thickness.
  • Assessment of astigmatism changes and their effect on IOL power.

Main Results:

  • Trabeculectomy causes decreased axial length and anterior chamber depth.
  • Crystalline lens and choroidal thickness increase post-surgery.
  • With-the-rule astigmatism increases, affecting IOL calculations years later.

Conclusions:

  • Surgically induced biometric alterations significantly affect IOL power calculations.
  • Non-contact biometric techniques are recommended.
  • Postponing cataract surgery after trabeculectomy can minimize calculation errors.