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Related Concept Videos

Microbiome of the Eye01:22

Microbiome of the Eye

The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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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Related Experiment Video

Updated: Jun 16, 2026

Intracameral Injection in Rats with Low Risk of Adverse Effects
06:19

Intracameral Injection in Rats with Low Risk of Adverse Effects

Published on: May 31, 2024

[Study of different methods in reducing conjunctival bacteria before cataract surgery].

Yu-sen Huang1, Yun-hai Dai, Shi-ying Sun

  • 1Qingdao Eye Hospital, Shandong Eye Institute, Qingdao, China.

Zhonghua Yi Xue Za Zhi
|February 9, 2010
PubMed
Summary

Preoperative topical antibiotics and povidone-iodine (PVI) effectively reduce conjunctival bacteria before cataract surgery. One-day and three-day antibiotic treatments show similar efficacy, with levofloxacin demonstrating high sensitivity for Gram-positive cocci and Gram-negative bacilli.

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Related Experiment Videos

Last Updated: Jun 16, 2026

Intracameral Injection in Rats with Low Risk of Adverse Effects
06:19

Intracameral Injection in Rats with Low Risk of Adverse Effects

Published on: May 31, 2024

Modeling Cataract Surgery in Mice
05:19

Modeling Cataract Surgery in Mice

Published on: December 1, 2023

Conjunctival Commensal Isolation and Identification in Mice
07:52

Conjunctival Commensal Isolation and Identification in Mice

Published on: May 1, 2021

Area of Science:

  • Ophthalmology
  • Microbiology
  • Surgical Prophylaxis

Context:

  • Cataract surgery requires effective preoperative bacterial reduction.
  • Conjunctival bacterial flora poses a risk for postoperative infections.
  • Standard prophylactic regimens aim to minimize surgical site infections.

Purpose:

  • To investigate the conjunctival bacterial flora in patients undergoing cataract surgery.
  • To evaluate the efficacy of different topical antibiotic regimens (levofloxacin, tobramycin) and povidone-iodine (PVI) irrigation in reducing conjunctival bacteria.
  • To compare the effectiveness of one-day versus three-day topical antibiotic application.

Summary:

  • A study randomized 135 patients into three groups receiving different topical antibiotics (levofloxacin 0.5%, levofloxacin 0.3%, tobramycin 0.3%) for one or three days, all with PVI irrigation.
  • Results showed no significant difference in bacterial reduction between one-day and three-day antibiotic treatments.
  • Levofloxacin exhibited high sensitivity against both Gram-positive cocci (94.8%) and Gram-negative bacilli (94.4%), while tobramycin showed lower sensitivity.

Impact:

  • The findings suggest that a one-day topical antibiotic regimen is as effective as a three-day regimen for reducing conjunctival bacteria prior to cataract surgery.
  • Povidone-iodine irrigation in conjunction with topical antibiotics further enhances bacterial reduction.
  • Levofloxacin is a highly effective antibiotic choice for preoperative prophylaxis in cataract surgery due to its broad-spectrum sensitivity.