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Cognitive functions and normal tension glaucoma.

Akvile Daveckaite1, Evelina Grusauskiene2, Kestutis Petrikonis2

  • 1Department of Ophthalmology, Lithuanian University of Health Sciences, Kaunas 50009, Lithuania.

Indian Journal of Ophthalmology
|October 19, 2017
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Summary
This summary is machine-generated.

Normal tension glaucoma (NTG) patients performed worse on the clock drawing test (CDT) for cognitive function assessment compared to cataract patients. This suggests CDT may help screen for cognitive impairment in glaucoma.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Gerontology

Background:

  • Cognitive function impairment is a growing concern, with limited research on its association with glaucoma.
  • Previous studies on glaucoma and cognitive function have yielded controversial findings.
  • The clock drawing test (CDT) offers a rapid method for cognitive assessment.

Purpose of the Study:

  • To compare cognitive function between normal tension glaucoma (NTG) and cataract patients using the CDT.
  • To evaluate the efficacy of two scoring systems (Freund and Rakusa) for the CDT.
  • To explore the potential of CDT as a screening tool for cognitive impairment in glaucoma.

Main Methods:

  • A prospective pilot study included 30 NTG patients and 30 cataract patients.
  • Participants completed a CDT, drawing a clock set to 11:10.
  • The CDT was scored using the Freund (7-point) and Rakusa (4-point) methods.

Main Results:

  • NTG patients demonstrated significantly lower CDT scores than cataract patients by both Freund (P=0.003) and Rakusa (P=0.004) scoring systems.
  • A distinct drawing pattern was observed in 60% of NTG patients versus 10% of cataract patients (P=0.001).
  • These findings indicate potential cognitive differences associated with NTG.

Conclusions:

  • NTG patients exhibit poorer performance on the CDT, suggesting possible cognitive impairment.
  • The CDT, particularly with specific scoring systems, may serve as a valuable screening tool for cognitive function in glaucoma.
  • Further research is warranted to confirm the reliability and utility of CDT in glaucoma patients.