Preferential hyperacuity perimeter in the study of diabetic macular edema

Authors

  • Ana Cláudia Moreira Rebelo de Matos Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa. Lisboa, Portugal.
  • Cristiana Miranda Gomes Ferreira Gaspar Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa. Lisboa, Portugal.
  • Marisa Alexandra da Eira Duarte Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa. Lisboa, Portugal.
  • Patrícia Alexandra Valado Marques Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa. Lisboa, Portugal.
  • Ilda Maria Poças Área Científica de Ortóptica, Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa. Lisboa, Portugal.
  • Carina Silva-Fortes Área Científica de Matemática, Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa. Lisboa, Portugal.
  • Luísa Queirós Oftalmologista. Centro Hospitalar de Lisboa Ocidental. Lisboa, Portugal.
  • Ana Bivar Oftalmologista. Centro Hospitalar de Lisboa Ocidental. Lisboa, Portugal.

DOI:

https://doi.org/10.25758/set.534

Keywords:

Vernier acuity, Diabetes, Diabetic macular edema, Metamorfopsia, Preferential hyperacuity perimetry

Abstract

Introduction – Preferential hyperacuity perimeter (PHP) is a new psychophysical test, which principle is based on the detection of metamorphopsia in age-related macular degeneration (AMD). It is intended to verify its effectiveness in the study of diabetic macular edema (DME). When there is a loss of pericytes in the vascular wall occur a number of microcirculatory changes that lead to the appearance of microaneurysms and other vascular changes that allow the passage of blood components to the surrounding retinal tissue in a normal situation do not occur, these being one of the causes exudative diabetic macular edema. Methodology – It was performed a quantitative study, using descriptive and correlational analysis. A sample of 33 patients was selected, and 60 eyes were analyzed. Results – The sensitivity of PHP on the detection of metamorphopsia associated with EMD was 70.6%, the specificity was 11.5% and the global efficiency of the test was 45%. It was found a weak negative correlation (Phi= -0.215) between the PHP and optical coherence tomography (OCT). Conclusions – This new method of diagnosis was sensitive, but not very specific and effective in the detection of metamorphopsia, due to the DME.

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References

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Published

2012-11-15

Issue

No. 08 (2012): Novembro 2012

Section

Artigos

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How to Cite

Preferential hyperacuity perimeter in the study of diabetic macular edema. (2012). Saúde & Tecnologia, 08, 31-38. https://doi.org/10.25758/set.534