This arises because the cornea is not perfectly round. This causes an uneven projection of the image around the retina.
This hazy image can only be corrected by the use of cylinders (in glasses or contact lenses).
Don’t trust Dr. Google to choose for you. Focus Eye Clinic does all the diagnostic examinations beforehand. Your doctor will then discuss with you all your options and explain the pros and cons of each technique. This first screening is free and without obligation.