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Related Experiment Videos

Sweet hyperopia: refractive changes in acute hyperglycemia.

M-C Tai1, S-Y Lin, J-T Chen

  • 1Department of Ophthalmology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China. mingtai1966@yahoo.com.tw

European Journal of Ophthalmology
|October 25, 2006
PubMed
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Acute hyperglycemia in diabetes patients can cause temporary hyperopia. This refractive shift is likely due to changes in the lens

Area of Science:

  • Ophthalmology
  • Endocrinology
  • Diabetology

Background:

  • Diabetes mellitus is a chronic metabolic disorder characterized by elevated blood glucose levels.
  • Acute hyperglycemic episodes can potentially affect various physiological functions, including ocular parameters.

Purpose of the Study:

  • To investigate refractive and ocular biometric alterations in patients experiencing acute hyperglycemia due to diabetes mellitus.

Main Methods:

  • Prospective study involving 24 diabetic patients with plasma glucose >or=17 mmol/L or HbA1c >or=10.0%.
  • Ocular parameters including refraction, anterior chamber depth, lens thickness, axial length, keratometry, and corneal thickness were measured.
  • Follow-up examinations were conducted at 1, 2, and 4 weeks post-hyperglycemic episode.

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Main Results:

  • A significant hyperopic shift (+1.9+/-0.8 D) was observed in 33% of eyes during acute hyperglycemia.
  • No significant changes were noted in anterior chamber depth, lens thickness, axial length, thinnest corneal thickness, or mean keratometry.
  • The majority of patients (67%) did not exhibit significant refractive changes.

Conclusions:

  • Transitory hyperglycemia can induce hyperopia in diabetic patients.
  • Changes in the lens' refractive index are a potential cause for the observed hyperopic shift.
  • No alterations in ocular biometrics of the lens or cornea were detected during the study period.