Contrast sensitivity assessment in different age group

Session Details

Session Title: Imaging I

Session Date/Time: Monday 12/09/2016 | 14:30-16:30

Paper Time: 16:18

Venue: Hall C2

First Author: : L.Coelho BRAZIL

Co Author(s): :    S. Reinaldo Oliveira   P. Castro Vilas Boas   S. Chalub Fonseca   S. Rodrigues Souza   T. Paula Guimares        

Abstract Details

Purpose:

To compare contrast sensitivity in different age groups: 20 to 25, 40 to 45 and above 60 years old.

Setting:

Faculdade de Ciências Médicas (Medical Science College) ,Belo Horizonte, Minas Gerais, Brazil.

Methods:

We conducted a cross sectional study with individuals of different ages, with visual acuity better than 20/25, without eye disease and without prior eye surgery. Visual acuity was measured by Snellen test and contrast sensitivity was evaluated by OPTEC 3500P® equipment. Statistical analysis was performed using Wilcoxon test, considering a 95% confidence interval.

Results:

Compared to patients between 20 and 25 years, patients between 40 and 45 years old presented decreased contrast sensitivity at 1,5 cpg frequency in nocturnal mode. When compared to patients between 40 and 45 years, patients over 60 years old presented decreased contrast sensitivity at frequencies of 6,0 and 12,0 cpg in diurnal mode and 12,0 and 18,0 cpg in nocturnal mode. But when compared to patients between 20 and 25 years, patients older than 60 years old showed contrast sensitivity decreased at frequencies of 6,0, 12,0 and 18 cpg in diurnal mode and at all frequencies in nocturnal mode.

Conclusions:

Contrast sensitivity seems to decrease with age, after 45 years old, especially in middle and high spatial frequencies. This condition may affect reading, direction and mobility, as well as other daily activities.

Financial Disclosure:

NONE