🔵 How to read Visual field reports
‎1) make sure the patient's name and age is entered right in the machine.
‎Name for accurate identification. And age for proper choice of database for the patient's age.
2) Check test type:
30-2 for neurological patients
24-2 for glaucoma patients
10-2 for tunnel vision patients ( advanced glaucoma)
3) Check strategy
SITA standard or SITA fast
(Better to use same strategy every time for better comparison)
4. check refractive lens used if needed
5) Check reliability indices:
Fixation losses should be <15%
False positive should be <30%
False negative should be <30%
If those are above this level the test is not reliable
🔹Total deviation map :
Gives you the real deviation of each point from normal. The solid black points means it can be found in only 0.5% of normal people. So its most likely pathological decrease in sensitivity of this point specially if it has adjacent points.
🔹 Pattern deviation map:
The most important because the machine removes generalized decrease in sensitivity (which is usually caused by cataract or corneal desease or..) from the total deviation map and keep only focal loss of sensitivity which is caused usually by glaucoma
🔹 GHT:
(glaucoma hemifield test) which compares superior and inferior hemifields and if there is certain amount of deference this goes with the diagnosis of glaucoma.
🔹 VFI:
Visual Field Index is an index that assigns a number between 1% and 100%, 100% being a perfect visual field.
🔹MD:
(Mean deviation) of -2.00 or less could indicate glaucoma
🔹PSD:
(Pattern standard deviation) A high PSD indicates localized sensitivity loss (ie, not due to diffuse depression from cataract or vitreous hemorrhage).
If increasing usually means glaucoma is progressing.
‎1) make sure the patient's name and age is entered right in the machine.
‎Name for accurate identification. And age for proper choice of database for the patient's age.
2) Check test type:
30-2 for neurological patients
24-2 for glaucoma patients
10-2 for tunnel vision patients ( advanced glaucoma)
3) Check strategy
SITA standard or SITA fast
(Better to use same strategy every time for better comparison)
4. check refractive lens used if needed
5) Check reliability indices:
Fixation losses should be <15%
False positive should be <30%
False negative should be <30%
If those are above this level the test is not reliable
🔹Total deviation map :
Gives you the real deviation of each point from normal. The solid black points means it can be found in only 0.5% of normal people. So its most likely pathological decrease in sensitivity of this point specially if it has adjacent points.
🔹 Pattern deviation map:
The most important because the machine removes generalized decrease in sensitivity (which is usually caused by cataract or corneal desease or..) from the total deviation map and keep only focal loss of sensitivity which is caused usually by glaucoma
🔹 GHT:
(glaucoma hemifield test) which compares superior and inferior hemifields and if there is certain amount of deference this goes with the diagnosis of glaucoma.
🔹 VFI:
Visual Field Index is an index that assigns a number between 1% and 100%, 100% being a perfect visual field.
🔹MD:
(Mean deviation) of -2.00 or less could indicate glaucoma
🔹PSD:
(Pattern standard deviation) A high PSD indicates localized sensitivity loss (ie, not due to diffuse depression from cataract or vitreous hemorrhage).
If increasing usually means glaucoma is progressing.
