Cancer starts when cells in specific part of  the body begin to grow out of control. It also can spread to different area of body. Eyes have three  major sections, the eyeball, the orbit, and there are a number of various  types of cancer that affect different sections of eyes. However, the symptoms for eye cancer are not always  obvious, there are still  some indicators such as shadows, flashes of light, or wiggly lines in your vision, blurred vision, a dark patch in your eye that's getting bigger, partial or total, bulging of one eye and a lump on your eyelid or in your eye that's increasing in size. Depending on the type and stage of the cancer, there are treatment options for eye cancer such as surgery, radiation therapy and laser therapy. In addition, chemotherapy and targeted therapy might apply for eye cancer as well as other cancers.

Infections are caused    by either bacteria or viruses . Viruses are very tiny germs made of genetic material inside of a protein coating. Viruses cause infection diseases such as common cold ,flue and warts. VirusES can kill , damage, or change the cells and make people sick . Different viruses attack different part of the body and certain cells such as blood , liver and lungs. In some cases the immune system of body fights against viruses so people do not feel sick but in other cases immune systems are not able to get rid of viruses and then infection's symptoms appear .   Flu could cause infection  and its  symptoms can be 1 or 2 or all of  the list bellow                                                         
  .Fever                                                                                                                                                              .Chills and sweats.
.Change in cough or a new cough.
.Sore throat or new mouth sore.
.Shortness of breath.
.Nasal congestion.
.Stiff neck.
.Burning or pain with urination.
.Unusual vaginal discharge or irritation..Increased urination.
.Redness, soreness, or swelling in any area, including surgical wounds and ports.
.Diarrhea.
.Vomiting.
.Pain in the abdomen or rectum.
.New onset of pain