METHOD FOR ASSESSING FUNCTIONAL STATE OF MACULAR REGION IN RETINAL PATHOLOGY Russian patent published in 2014 - IPC A61B3/02 

FIELD: medicine.

SUBSTANCE: patient is tested with 3D-CTAG (3D Computer-Automated Threshold Amsler Grid test). At testing, the patient is suggested to mark invisible sectors of the Amsler grid on the screen in the centre, as well as sectors with visible line distortions; the patient marks the above sectors at various grey scale levels correspondent to five contrast sensitivity levels starting from zero. The data are processed. If observing 1 defect in the middle and at various levels with a zero contrast level of 13% or more, a relation of the visual loss volume to vision hill of 5.0-15.0%, total lost area of less than 100%, a contrast level with the greatest defect area, 2, a postoperative cystic macular oedema is stated. If observing 2-10 defects arranged at 2 and more levels with a zero contrast level 4% and more, a relation of the visual loss volume to vision hill of 2.0-15.0%, any total lost area and a contrast level with the greatest defect area, a non-pseudofakic cystic macular oedema is diagnosed. If observing 1 defect in the middle and at various levels with a zero contrast level of 13-23% or more, a relation of the visual loss volume to vision hill of 2.0-5.0%, total lost area of less than 60%, any contrast level with the greatest defect area, a macular hole is diagnosed. If observing 1 defect in the middle and at various levels with a zero contrast level of 24% or more, a relation of the visual loss volume to vision hill of 41.0% or more, total lost area of less than 100%, any contrast level with the greatest defect area, a fibrous scar is stated.

EFFECT: method enables optimising the assessment of the functional state of the macular region in a retinal pathology by using 3D-CTAG test providing three-dimensional imaging of the visual field defects and measuring the changes.

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