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Related Experiment Videos

Asteroid hyalosis.

Z Yazar1, S Hanioglu, G Karakoç

  • 1Ankara Numune Hospital, Ophthalmology Department, Turkey. eksalk@ato.org.tr

European Journal of Ophthalmology
|April 4, 2001
PubMed
Summary
This summary is machine-generated.

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Risk factors for vitreous loss in cataract surgery.

European journal of ophthalmology·2000

Asteroid hyalosis is linked to systemic diseases like diabetes and hypertension. This condition can also affect axial length measurements, potentially impacting intraocular lens calculations before cataract surgery.

Area of Science:

  • Ophthalmology
  • Internal Medicine
  • Medical Diagnostics

Background:

  • Asteroid hyalosis (AH) is characterized by calcium-lipid spheres in the vitreous.
  • The association between AH and systemic diseases requires further investigation.
  • Accurate axial length measurement is crucial for intraocular lens (IOL) power calculations.

Purpose of the Study:

  • To evaluate ocular and systemic diseases in patients with asteroid hyalosis.
  • To compare axial lengths in patients with AH versus a control population.
  • To assess the clinical implications of AH on diagnostic measurements.

Main Methods:

  • Conducted a study on 26 patients diagnosed with asteroid hyalosis.
  • Performed comprehensive ocular examinations and systemic evaluations, including blood pressure and laboratory tests.

Related Experiment Videos

  • Utilized A-scan and B-scan ultrasonography to measure axial lengths and detect posterior vitreous detachment (PVD).

    • Main Results:

    • Unilateral AH was observed in all patients; 38.5% experienced symptoms.
    • Significant prevalence of systemic conditions: type II diabetes mellitus (20.5%), systemic arterial hypertension (33.3%), atherosclerotic heart disease (18%), hyperlipidemia (12.8%), and hypercholesterolemia (15.4%).
    • Patients with AH showed a greater mean axial length difference between eyes (0.32 mm) compared to controls (0.10 mm), indicating potential measurement artifact.

    Conclusions:

    • Asteroid hyalosis frequently coexists with systemic diseases, necessitating systematic screening for diabetes mellitus, hypertension, and hyperlipidemia.
    • AH can lead to artifactually lowered axial length measurements, potentially causing significant errors in IOL power calculations.
    • Ophthalmologists must consider the impact of AH on axial length measurements to avoid errors in pre-operative assessments for cataract surgery.