Is all eye redness called conjunctivitis?

No. Conjunctivitis is defined as inflammation of the conjunctiva. One of the principle markers of inflammation is redness caused by dilation of the blood vessels. Therefore, all forms of conjunctivitis have varying degrees of associated redness. However, not all redness is caused by conjunctivitis. For example, a broken blood vessel can cause redness but is not caused by inflammation.

Related Questions

What is the best way to get rid of eye redness from conjunctivitis?

Patience. Conjunctivitis is usually a viral infection of the lining of the eye and the redness and dilation are the bodies response to try and rid itself of the infection. Even if there were a way to get rid of the redness, you would want the defensive responses to remain active. Have patience and your body will win the battle and the redness with recede.
Red eye. Temporary relief of eye redness can be achieved with naphcon-a, an over-the-counter drop. Do not overuse this, since it can cause rebound redness. Viral conjunctivitis is usually self-limited, lasting from 1-4 weeks. Cold compresses may help keep the eye comfortable during this time.

Red eye problem - how do I tell if it's conjunctivitis?

See your doctor. Problems like these can only be correctly handled by your doctor in person. He/she needs to listen to you, perform an examination and possibly run labs or other tests. That's the only way he/she can find out what's going on and what to do about it.

I have red eye more than 1 week without any help with antibiotic eye drops. What other underlying causes of red eye other than conjunctivitis?

Viral. Majority of pink eyes or conjunctivitis are viral, therefore they have to run their course usually 10-14 days. Antibiotics alone won't make any difference. Antibiotics and mild steroids given under opththalmologists care can decrease the redness. But either way it will there for the full course of it. If only one eye is red then there are many more dx:, iritis, foreign body, to name a couple.
Many things. Red eyes can be from inflammation from chronic allergies, dry eye syndrome, blepharitis (minor infection of the eyelid margin), meibomianitis (blocked ducts on eyelid margin. In addition, you may have inflammation on the top of the eye, episcleritis or scleritis or in the front to the eye, irtis. You need the right diagnosis to get the treatment to get rid of red eyes. You need eye exam.

92 what is length of time to take gentamicin for eye redness? Dr ordered for only 2 days. Why? She never saw me for it, just called nursing home w/ rx

Inappropriate. Prescribing gentamicin for eye redness without an examination is really not very helpful. Though the drug is unlikely to have harmed you, there are many causes for a red eye that have nothing to do with a bacterial infection, which I presume is what your doctor thought he was treating. Insist that the doctor see you or obtain an ophthalmology consultation for you.
Wrong treatment. Gentamicin is a terrific antibiotic for the eye but is ineffective if the cause of redness is something else. If the redness is still present after 2-3 days, then seek an ophthalmologist to determine an alternate cause. The gentamicin almost certainly did not harm but might not be the right treatment.