Dr. Colin A Mccannel M.D.

Rosacea is a very common skin condition that frequently affects people aged above 30 years. It produces redness on your cheeks, nose, and forehead. Although it commonly affects women, more severe symptoms occur in males. Approximately 16 million people are affected in the United States alone, and it...

Eye floaters are small, moving specks on the eyeball that often occur in one's field of vision. These grey or black dots, become more prominent while looking at a bright object. If the floaters are large they may shadow vision, but in most cases, eye floaters are harmless. People often neglect or...

What is a stye?A stye occurs when a particular strain of bacteria affects the oil gland of the eyelid. It becomes infected and causes inflammation, redness, as well as pain on the eyelid and its surrounding tissues. A stye is an inflamed swelling or circumscribed abscess. It can be treated with...

What is Chalazion?A chalazion is a benign and painless nodule which can occur in the upper or lower eyelid. It is common and is sometimes called a meibomian cyst or a tarsal cyst. The term chalazion (pronounced kah-la'-ze-on) originates from the Greek word which means a small lump. These nodules...

Color blindness is not a real blindness but a deficiency in seeing colors. People having color blindness can’t distinguish between certain colors, like red and green, or blue and yellow. The red and green color deficiency is the most common type of this condition.What causes color blindness?It is...

Neonatal conjunctivitis or ophthalmia neonatorum is a type of infection that newborns contract during delivery. The newborns contract this infection in cases when the mother is infected with Chlamydia trachomatis or Neisseria gonorrhoeae.Neonatal conjunctivitis is any type of conjunctivitis that...