What is the difference between dry eyes, eye fatigue and failing eyesight?

Totally different. Dry eyes means a lack of quantity or quality of tears at make the eyes feel dry, gritty and scratchy. Eye fatigue refers to achiiness and headaches around the eyes while failing eyesight means the visual acuity is declining and it is becoming harder to see.
Dry eye. Dry eye causes the eye to feel tired (eye fatigue) and as the dry eye worsens it can cause blurred vision (failing eyesight). With treatment, these issues can be avoided.

Related Questions

Why does eye fatigue cause dry eyes?

Eye overuse? Fatigue is a symptom, so it can't cause dry eyes. However, overuse of your eyes can cause dry eyes which can give you that symptom. Having dry eyes in itself can cause you to have the symptom of fatigue as well. Read more...
It doesn't. . Your close but you actually have it backwards. Dry eye causes your eyes to feel fatigued. You can try otc lubricating drops. If that doesn't help see your ophthalmologist who can talk to u about other options. Read more...
Dry eye. With prolonged near or computer work, the eyelid blink rate decreases and the eyes get dry, leading to eye fatigue. With treatment, this issue can be avoided. Read more...

Is there a the difference between eye fatigue and failing eyesight?

Yes. Eye fatigue is due to overexertion of eye muscles, also termed asthenopia. Relaxation will help. Failing eyesight is more likely more permanent and may be due to refractive errors, cataract, glaucoma or macular degeneration. Read more...
Yes. Eye fatigue occurs when you are tired or your eyes have been "overworked". After long hours reading or working up close, the eyes may become dry and irritated. Failing eyesight implies that the eyes are no longer working as well as they should be or used to. It is important to see an eye doctor who can determine the cause of failing eyesight. Read more...

What is the difference between eye fatigue and poor eyesight?

Cause & effect. Eye fatigue is often caused by one struggling to see with poor eyesight. The tiny muscles in your eyes continually try to focus a lens that by your age is getting stiff and won't focus as close up as it used to. These muscles naturally get tired. Read more...