My diagnosis of UnsubRocky's case, high pressure in the eye and possible glaucoma risk:
High pressure in your eyes which can cause loss of vision if not corrected. See an eye specialist.
If its high pressure due to blockages of the fluid path in your eye it is simple fix by minor laser eye surgery.
The effect can be intermittent and fleeting because high pressure may not be sustained. If that is so, you are lucky if it induces you to seek treatment before the damage becomes more serious.
https://healthyinfodaily.com/8-symptoms-of-glaucoma/8/ Quote:2. Distorted Vision
In addition to having to deal with the affects of blurry vision, encountering distorted vision is yet another degenerative sign of having the disease. Unlike blurred vision which entails not being able to see a clear image of an object (objects appear out of focus), distorted vision is characterized as seeing objects that abnormally appear to be warped or bent out of alignment from the shape of familiarity you usually associate them with having. The damage received by the optic nerve due to the build-up of pressure in the eye can indeed cause one to undergo this effect as one of many. If you are experiencing any signs of abnormal vision, please consult with your local ophthalmologist for possible glaucoma diagnosis and treatment to further avoid any irreparable damage to the eye. ...
... 4. Eye Pain
With glaucoma (narrow-angle in particular), blockage for the draining of the eye is created due to the narrow/closed angle of the eye canal and this creates rapid pressure build-up within the eye. In so saying, the internal eye pressure usually brings about extreme discomfort and eye pain. Being that the cornea of the eye is highly sensitive to pain, people tend to experience sensations within their eyes that may feel sharp, aching, throbbing, or even as if something foreign is in their eye. In addition to this, exposure to bright light is also known to worsen eye pain. Furthermore, pain and irritation of the eyes will cause them to appear red. ...
... 6. Sudden Visual Disturbance
Due to the fact that glaucoma is characterized as being an eye disease that occurs with no forewarning symptoms, many individuals who unknowingly have the disease will usually experience a sudden visual disturbance. This type of disturbance is describes as being the instance in which one goes from having normal vision and being able to see objects in focus, to immediately having abnormal vision in which objects become hard to see or are out of focus. People diagnosed as having the open-angle type of disease most likely experience this symptom because in contrast to that of the narrow-angle type that openly exhibits a defective eye, the eyes of those with open-angle appear to be normal.
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... 7. Headache
It can be obviously concluded that those who have to suffer through the painful effects of optic nerve damage experience abnormal visual perspectives that tend to be accompanied by headaches. The inability to properly see out of the eyes and the consistent straining to do so can be very stressful and can make one feel lightheaded—bringing about headaches. Headaches that arise can usually be felt in the forehead above the eyes or in and around the eye region itself. Nevertheless, these occurring aches brought on by the disease will also range in pain intensity from mild, to moderate, and severe. ...