Yes, it is possible for you to get vision snow from depression. The bad mood will affect your eyes pressure which may cause the vision snow. You'd better keep the good mood and protect the eyes carefully. In order to remove your visual snow, you could have the good rest for the eyes first. Then you could use the eye drops to release it. The warm compress is also a good home remedy which could help you a lot.
Well, in my opinion, there is nothing to do with depression, when someone suffers from visual snow. And according to some researches, chemical changes can just lead to visual snow. Generally speaking, visual snow is a transitory or persisting visual symptom where people see snow or television-like static in parts or the whole of their visual fields, especially against dark backgrounds. And because of that, it will just make your eyes uncomfortable. Also, some visual disturbances such as starbursts, increased afterimages, floaters, trails will just accompany with it.
In fact, it is possible to get vision snow from depression. In most cases, depression, stress, fatigue and bad mood can take an effect on eyes. So a good mood is really necessary to help keep healthy.
Apart from the reasons listed above, there are also many other factors that take an effect on our sight. For example, inflammation of the optic nerve can lead to vision snow. Besides, lyme disease, auto-immune disease can also be the cause of vision snow.
As for the treatment, there is no established treatment for vision snow at present. However, vision snow can indicate other eye problems, so you can go to see a doctor and appply to medical help. In daily life, you had better pay more attention to your living habit. Keeping a good mood is beneficial to human life. Going on a balanced diet is also important.