Universal no leak fit extremely comfortable goggle that is fully adjustable offers an excellent option for swimmers who need a corrective goggle Comes with 3 Bridges in order to adjust fit. Swim goggles will fit Kids, Teens and Adults Professional Swimming Goggles: Size from (+1.0 to +8.0)If you have little difference between 2 eyes, like +4.0 and +4.5, you can choose a pair of +4.0 or If you have big difference between your 2 eyes, like +2.0 and +6.0, you can buy 2 pairs and assemble them.