Possible complications and their frequency

Common (≥1 / 100)
• Blurred vision and / or shadow or double images. These are the refractive errors that can come from some multi-focus implants.
• Reduction of contrast vision (change of gradient in the gray color scheme).
• Bows / halos and light rays from light (eg from street lights and light cars). This is the most pronounced first month after surgery and is due to the refractive properties of polyurethane artifical lenses.
• Floating spots or strings in the field of vision that are best seen when looking at a light background. This is due to changes in the vitreous gel and is a natural phenomenon that can become more pronounced after eye surgery.
• Secondary cataract. The capsule behind the artificial lens can become cloudy which causes the vision to worsen. This can happen soon after surgery or many years later. The situation is simple to treat with a quick laser procedure.
• Some people may experience discomfort from different types of lighting, e.g. fluorescent light, first after eye surgery. This is something thatlessens and resolves with time

• Mild discomfort and irritability in the eyes is common for a few weeks after surgery.

Infrequent (<1/100)
• Persistent blurred vision and / or shadow or double images

• Perent beams / rings and light rays from light (eg from street lights and light cars).
• Pain and discomfort in the eyes and blurred vision. Is usually not a persistent condition but can last for weeks / months. It is recommended that artificial tears be used or combined with other treatments.
• Reduced visual acuity, ie that visual acuity with or without glasses will not be as good as glasses before surgery.
• Macular edema (the part of the retina with a sharp vision). Can lead to worse sight. In most cases this goes away and sight will be as before. Anti-inflammatory drugs given after surgery reduce the likelihood of edema.
• Need for reading glasses in spite of the multifaceted intraocular lens implant.

Rare (<1/1000)
• Retrobulbar hemorrhaging, approximately 1 in 10,000 patients develop a retrobulbar hemorrhage each year. Those who have already undergone eye surgery are at increased risk.
• If, due to complications in the operation, the multi-focal lens implant can not be placed in an estimated spot in the eye, the surgeon may choose to place artificial lens with one strength (non-multifocal). There may be a need for glasses after the operation.
• Bacterial infection. Requires rapid treatment with antibiotics, but vision may be threatened. To reduce the risk of a serious infection, antibiotics are always given at the end of surgery.

Above mentioned are the main complications that may arise in multiple eye surgery. As with all surgeries other and unusual problems may arise. Most of these problems are manageable.

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