For subjects with glaucoma, other retinal diseases, or disorders of the visual system:

1\. Patient age \> 12 years

2\. Compliance with investigator instructions, tests and visit during subject participation in the study.

3\. Sufficient fixation ability

4.Best corrected visual acuity of 20/200 or better in at least one eye, or capable to see the visual stimulus at least in one eye.

For healthy volunteers:

1\. Patient age \> 12 years

2\. Compliance with investigator instructions, tests and visit during subject participation in the study.

3.Best corrected visual acuity of 20/20 in both eyes.

4\. Sufficient fixation ability

Virtual Reality for Enhancement of Vision