Cad is gá duit a bheith ar an eolas faoi cheartú fís léasair?

Many of us are considering laser vision correction. No wonder, because we often don’t like wearing glasses, they are unwieldy for us or we would like to permanently solve vision problems.

Among the vision defects that can be treated with this type of surgery are myopia in the range of -0.75 to -10,0D, hyperopia from +0.75 to +6,0D and astigmatism up to 5,0D.

scrúdú cáilitheach

Before classifying a person between 18 and 65 years of age for laser vision correction, the doctor checks visual acuity, conducts a computer vision test, subjective refraction test, assessment of the anterior segment of the eye and the fundus, examines intraocular pressure, and also checks the thickness of the cornea and its topography. Due to the eye drops dilating the pupil, we must refrain from driving for several hours after the procedure. Classification will most likely take approximately 90 minutes. After this time, the doctor will decide whether to allow the procedure, suggest the method and answer the patient’s questions regarding the correction.

Laser correction methods

• PRK – the epithelium of the cornea is permanently removed, and then its deeper layers are modeled using a laser. The recovery period extends the regrowth of the epithelium.
• LASEK – is a modified PRK method. The epithelium is removed using an alcohol solution.
• SFBC – so-called EpiClear allows you to remove the corneal epithelium by gently “sweeping” it into the bowl-shaped tip of the device. This surface method speeds up treatment after surgery and reduces pain during rehabilitation.
• lasáin – the microkeratome is a device that mechanically prepares the corneal flap to put it back in its place after laser intervention on the deeper layers of the cornea. Convalescence is fast. As long as the cornea has the appropriate thickness, the indication for this method are large vision defects.
• EPI-LASIK – another surface method. The epithelium is separated using an epiceratome, and then a laser is applied to the surface of the cornea. After the procedure, the surgeon leaves a dressing lens on it. Since the epithelial cells are rapidly regenerated, the eye gains good sharpness on the same day.
• SBK-LASIK – surface method, during which the corneal epithelium is separated by a femtosecond laser or a separator, and then put back in place after the laser is applied to the surface of the cornea. Convalescence is fast.

Conas a ullmhú le haghaidh an nós imeachta?

Regarding preparations for the procedure, there are specific indications:

• up to 7 days before the correction, we should let our eyes rest from soft lenses,
• while up to 21 days from hard lenses,
• at least 48 hours before the procedure, we should refrain from drinking alcohol,
• give up using cosmetics, both face and body, 24 hours before the date,
• on the day on which we have an appointment, give up caffeine-containing drinks, such as coffee or cola,
• do not use deodorants, let alone perfumes,
• wash your head and face thoroughly, especially around the eyes,
• let’s dress comfortably,
• let’s come rested and relaxed.

Contraindications

The anatomical structure of the eye has a significant impact on the success of laser vision correction. Although it is considered a highly effective treatment, there are contraindications.

• Age – people under 20 years of age should not undergo the procedure, because their vision defect is not yet stable. On the other hand, in people over 65 years of age, correction is not carried out, because it does not eliminate presbyopia, i.e. a natural decrease in the elasticity of the lens, which deepens with age.
• Pregnancy, as well as the period of breastfeeding.
• Diseases and changes in the eyes – such as cataracts, glaucoma, retinal detachment, corneal changes, keratoconus, dry eye syndrome and eye inflammation.
• Some diseases – hypothyroidism and hyperthyroidism, diabetes, active infectious diseases, connective tissue diseases.