Night Lenses: How They Work, Advantages and Disadvantages

Orthokeratology in Singapore, or night lenses, are worn during the night and work to adjust the curvature of the cornea while you sleep, allowing you to wake up with an improved vision. When you wake up in the morning and take out your contact lenses, you will have clear eyesight that does not require any additional help. The impact lasts for one to three days after it has been applied. Because of this, the contact lenses must be worn every night.

How do night lenses work?

Overnight, the cornea’s outermost layer can be reshaped using custom-made night lenses. Because of this, the cornea’s refractive strength is altered, resulting in improved vision clarity during the day. In addition, if the night lenses are properly fitted to the eye, and proper hygiene practices are followed during the application, there is no risk to the wearer’s health. 

This lens type is particularly useful when regular contact lenses are incompatible with the wearer’s eyes. When you stop using the contact lenses, it takes the cornea approximately three days to go back to its normal shape. As a result, you can do anything you want using this strategy.

Before going to bed, night lenses are placed in the eye, providing a slight force against the cornea. Because night lenses are placed directly on the cornea, the pressure exerted by the lenses causes the cornea to rebuild over the course of approximately one week. After the desired result has been accomplished, you will no longer require corrective lenses such as glasses or contact lenses to see clearly during the day.

What are some of the benefits of using night lenses?

The benefits of using ortho-k lenses include:

  • The capacity to see clearly during the day without the need for corrective lenses or glasses; the impact typically lasts between one and three days.
  • A straightforward method which does not need the use of corrective lenses or surgical intervention to improve one’s vision.
  • Suitable for work areas that are either dusty or air-conditioned (carpenters, bricklayers, or PC).
  • Excellent for those who have busy lives, especially athletes.
  • Safe and rapid familiarisation.
  • It is possible to correct nearsightedness up to –5.00 dioptres and astigmatism up to 2.0 dioptres using this lens.
  • The tendency towards myopia in childhood may be corrected.

What are some of the drawbacks of using night lenses?

Because the night lens “begins its shift” as darkness falls, it is not recommended for persons who do shift work or other jobs needing to sleep fewer than six hours each day (such as those in the night service industry). In addition, if you wish to use night lenses, you must ensure your eyes are in good health. Because of this, you must receive sound advice from your optometrist or contact lens specialist on a consistent and frequent basis.