Choose a pair of perfect swimming goggles before going into the water
Most people do not realize that wearing improper swimming goggles not only hurt your eyes, but also increase your diopters and cause near-sightedness.

• Is it necessary to wear swimming goggles when you swim?
  Our eyes are accustomed to the medium of air (index of refraction : 1.00) to see objects clearly; but the refraction of water is 1.33. When your eyeballs contact directly with water and try to see objects under water, it is difficult to properly focus because the index of refraction of the eyes and the water are nearly the same. Our vision becomes impaired and it is harder to judge distance accurately. At this point, your hyperopic diopter is nearly +30.00 ~ +40.00. When swimming, your vision changed constantly above and under water.
  It is important to wear swimming goggles that does not change your vision and fit the change of refraction.
• What kind of swimming goggles is most comfortable?
  Comfortable swimming goggles can last long and should not have pressure on the eyeballs.If the goggles is for the myope, the vision must remain unchanged above and below water.It will not create dizziness.
• What are the best swimming goggles?
  It is important to have a clear vision both above and below water.
  Non-leakage in the water to prevent bacteria infection.
  Swimming goggles should be fog-resistant and should not fall off while swimming.
  Low drag and non-pressure on the eyeballs.
  Wider lens room to provide more oxygen to the eyes.
  UV protection.
  The function of prescription swimming goggles is same as the normal myopic optical glasses. It can correct vision and rectify the aberration at the edges.
  Proper PD value maintain the best visual condition.
• Can I find proper swimming goggles for the myopia or astigmatism or presbyopia?
  There are myopic swimming goggles for the myopes, and different diopters for each eye,for example: Sable has myopic lens from -1.50 ~ -10.0.
  You can not find swimming goggles for astigmatism on the market,
  The ideal diopter for astigmatism is to divide the astigmatism by 2 and plus the
  myopic diopter. For example: myopic -2.00 and astigmatism C-1.00
  the ideal diopter is -2.00 + (C-1.00 / 2) = -2.50
  Sable has lenses for presbyopia from +1.50 ~ +10.0