Contrast Sensitivity and Diabetic Macular Edema

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT02217306

Enrollment

132

Registered

2014-08-15

Start date

2014-01-31

Completion date

2014-08-31

Last updated

2014-08-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

DIABETES MELLITUS, DIABETIC RETINOPATHY, MACULAR EDEMA

Brief summary

Contrast sensitivity is a tool use to evaluate the visual function in all patients. It can be modified by different pathologies or by age. The purpose of this study is to identify the changes that could be in relationship with the course of diabetic retinopathy comparing with diabetic patient without retinopathy and in patients with diabetic macular edema so if it is a difference, research for therapeutic strategies to improve it in this patients.

Detailed description

Contrast sensitivity is defined as a subjective measurement, it is the ability to separate the image between figure and background, taking into account the minimum amount of light required; it is evaluated by the contrast threshold, which is the smallest amount of contrast needed to be able to see a target and solve their characteristics, would be his reciprocal value. Medina et al. curve reported in healthy Mexicans SC 5 to 80, where \> 51 years have decreased compared to contrast sensitivity studies international; further that contrast sensitivity in older groups of 41 years is decreased high frequency.

Interventions

None listed

Study design

Observational model

CASE_CONTROL

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

40 Years to 70 Years

Healthy volunteers

Inclusion criteria

* DIABETIC PATIENTS * 40-60 YEARS OLD * ANY GENDER * VISUAL ACUITY \>0.25 IN DECIMAL EQUIVALENT,

Exclusion criteria

* PATIENTS WITH CATARACTS OR OTHER MACULOPATHY * PATIENTS WITH CONTACT LENSES * PATIENTS WITH REFRACTIVE ERROR \>6.00DP * PATIENTS WITH PREVIOUS OCULAR SURGERY

Design outcomes

Primary

Measure	Time frame	Description
Contrast Sensitivity	up to 8 months	Diabetic patients who are attended at Ophthalmology service in a general hospital undergo to contrast sensitivity test evaluating all frequency by software with 5 spacial frequency (1.5, 3, 6, 12 and 18 cycle grade, Stereoptical Co 1996) in the Visual Basic program.

Countries

Mexico

Outcome results