Simultaneous Vision Contacts - Different multifocal contact lens designs for presbyopia correction

The basic design for simultaneous vision contacts includes one power for distance vision and one power for near vision, as is the case with most multifocal contact lenses used for correction of presbyopia. Simultaneous vision contact lenses use different optical designs including:

Using two separate areas of the lens for each power

Using alternating zones on the lens for each power

Using a gradual change from one power to the other

Regardless of the design, simultaneous vision contacts need to fit centered on your cornea with both the distance and near prescriptions within your pupil area. You own visual system learns to interpret and use the correct power. The adjustment time varies for each individual.

Simultaneous vision contact lenses are prescribed to people with presbyopia, which is the condition where you need one pair of glasses (or prescription) for distance and another for objects close up (such as reading materials). This condition happens to many of us as we get older. Bifocal contacts (or multifocal contacts) are designed to give good vision to people with presbyopia.

Other bifocal contact lens designs and prescriptions for the correction of presbyopia include:

Concentric design bifocal contacts

Alternating vision contacts and

Monovision

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