If you suffer from a cataract or early stage cataract, you will notice reduced visual acuity. Your vision deteriorates; you have an impression of a fog and bright light blinds you. You are not happy with your spectacles after replacing them many times over the past few months.

Cataracts generally appear after age 65.  This phenomenon of opacification of the lens reduces the quantity and quality of light entering the eye necessary for vision. When a cataract begins to develop, you are not aware that you are suffering from the illness, because the effects on your vision are slight or absent. As the lens becomes more clouded, the symptoms worsen, causing significant deterioration of vision that can lead to blindness.

The development of a cataract is often very slow. If you notice gradual loss of vision, the services of a cataract surgeon may be envisioned. The timing of the operation can vary with each patient because there is no specific age for performing it and the decision is subjective.  You are urged to speak directly to your ophthalmologist about it.

Like with any surgical procedure, there are risks.  They are rarely serious, but you should be aware of them.

Risks for all kinds of refractive surgery

Vision can be slightly blurry at certain distances and occasional wearing of spectacles may be necessary.

The risk of infection is very low but the consequences can be serious (reduced vision).

Risks after implantation of a trifocal lens

Halos and light sensitivity: circles and bands that one sees around lights; these symptoms generally disappear after a few weeks or several months.

Reduced sensitivity to contrasts and modification of how colours are perceived can appear.

The surgical procedure is usually performed under local anaesthesia. It is brief and painless.

As with all surgical procedures, side effects can appear. With intraocular trifocal lenses, your vision may lose a certain degree of sharpness under poor conditions of visibility, such as low level of lighting and in fog. In this case, you might see halos and be dazzled by night lights which are more common than with a monofocal intraocular lens. These side effects generally disappear after a period of adaptation.

Regardless of the lens implanted, your positive attitude and your realistic expectations will influence the success of the surgical procedure and speed up the adaptation of your vision to the new visual impressions.  This period of adaptation can last several weeks. This is a relatively short period compared to your long-term objective which is freedom to see without spectacles.

Heredity or congenital deformities can cause early onset of cataracts.