1. This is a subconjunctival haemorhage. Most patients have no symptoms ,only the white of the eye is red. In my experience patients are first aware of it in the mirror or when someone asks what is wrong with their eye. Most of the time these will resolve on their own in 2-4 weeks. Rarely a more serious cause can occur so you should see an optometrist asap.
6. This is scleritis. It is a serious inflammatory condition that affects the tough white part of the eye called the sclera. It is often associated with underlying systemic conditions like rhumatoid arthritis. Symptoms include pain, redness, tearing, light sensitivity , tenderness. It is an ocular emergency and you should book to see an optometrist asap.
9. This is allergic conjunctivitis. This is an allergic reaction to pollen or other allergens. The eye has an overreaction to these allergans and the conjunctiva can become "puffy" slightly red and inflamed. It rarely affects vision and there is no pain normally. You should see an optometrist for diagnosis and possible eye drops to reduce inflammation.
10. This is a rare but serious eye infection caused by Acanthamoeba . It is found in water , soil and other habitats. It can cause severe loss of vision and potential blindness.Symptoms include pain, light sensitivity , reduced vision, foreign body sensation and tearing. It is more common in contact lens patients who do nnot disinfect their lenses properly , or do not wash their hans prior to insertion or removal. It can also occur in patients who swim in their contact lenses. This should be checked urgently by an optometrist.