Hello.welcome.These white patches have nothing to do with your using contact lenses.You must visit a dermatologist for the clinical examination,diagnosis and treatment.good luck.

Thanks for the query.
White patches can occur on the scalp, eye brows, eye lashes, hair turning to gray color, a loss of color inside the mouth, cheeks, circle around the areas of eye one can see as he/she is wearing glasses. These abnormalities can be caused due to many conditions such as physical or psychological stress, severe sun burn, surgery, pregnancy or chemical reaction.When the cells that make pigment cease to function white patches begin to appear at different places on the body. They need to be evaluated by your doctor. Some times, fungal infections too can give similar picture.
Your dermatologist will help you.
Thanks