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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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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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Correlation between changes in intraocular pressure and refractive error indices post Cataract Surgery.

Muhammad Afzal Bodla1, Ali Afzal Bodla2, Ayema Moazzam3

  • 1Muhammad Afzal Bodla, DORCS. Department of Ophthalmology, Multan Medical and Dental College Multan, Pakistan.

Pakistan Journal of Medical Sciences
|April 16, 2020
PubMed
Summary

Cataract surgery may lower intraocular pressure (IOP) in patients with refractive errors. While emmetropes and mild myopes show a quick IOP reduction, high myopes experience a gradual decline, suggesting an insignificant overall relation.

Keywords:
Cataract surgeryIntraocular pressurePhacoemulsificationRefractive errors

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Intraocular Pressure Management

Background:

  • Cataract surgery is a common procedure with potential effects on intraocular pressure (IOP).
  • Understanding the relationship between pre-existing refractive errors and post-operative IOP changes is crucial for patient management.

Purpose of the Study:

  • To investigate the correlation between different refractive errors and changes in intraocular pressure following cataract surgery.
  • To analyze the pattern of IOP fluctuations in emmetropic, mild myopic, and high myopic patients post-operatively.

Main Methods:

  • Retrospective case study involving 121 eyes undergoing phacoemulsification.
  • Pre-operative measurements of IOP and refractive error using Goldmann tonometry and auto refractometry.
  • Post-operative IOP monitoring at days 1, 7, 14, and 28.

Main Results:

  • Emmetropic and mild myopic eyes showed a transient 2-3 mmHg IOP elevation on day 1, followed by a consistent decrease.
  • High myopic eyes exhibited significant IOP fluctuations in the first 14 days, with a subsequent gradual decline.
  • Overall IOP decrease of 1-2 mmHg observed by study end.

Conclusions:

  • Cataract surgery can contribute to lowering IOP in patients with refractive errors.
  • The pattern of IOP change differs based on refractive error: swift in emmetropes/mild myopes, gradual in high myopes.
  • The overall relationship between cataract surgery and IOP changes in patients with refractive errors appears insignificant.