Femto LASIK laser vision correction

Femto LASIK is a flap-based method of laser vision correction. The procedure involves two stages using femtosecond and excimer lasers.

How is the procedure performed?

Stage one — flap creation. The femtosecond laser creates a tissue separation plane within the cornea, forming a thin flap with an intact hinge. The surgeon lifts the flap to access the stroma.

Stage two — corneal reshaping. The excimer laser performs a calculated stromal ablation, changing the cornea’s optical power. The flap is then returned to its original position. Sutures are usually not required.

Femto LASIK differs from conventional LASIK in how the flap is created: a femtosecond laser is used instead of a mechanical microkeratome.

How is suitability determined?

The choice depends on the safety and appropriateness of the method for the individual eye’s anatomy. The clinician assesses:

• refraction;
• pachymetry;
• corneal topography or tomography;
• the calculated residual stromal thickness;
• tear film condition;
• pupil size;
• the patient’s age and visual needs.

Which refractive errors can Femto LASIK correct?

The method may be used for myopia, hyperopia, and astigmatism within the limits permitted by the equipment and the individual characteristics of the eye.

KazRIED’s public webpage lists the following ranges:

• Myopia: up to −13.0 D.
• Hyperopia: from +1.0 to +4.5 D.
• Astigmatism: up to ±4.0 D.

Final eligibility for correction depends on the examination findings, not on the diopter value alone.

What should patients know about the outcome?

Correction reduces dependence on glasses and contact lenses, but does not stop age-related changes in the eye.

Presbyopia, cataracts, retinal diseases, and other conditions may affect vision later, independently of the surgical outcome.

The patient receives eye-drop instructions, restrictions and a follow-up schedule. Exact timing must be confirmed by KazRIED.

Ocular surface status

Expected early course: tearing, light sensitivity , foreign-body sensation, dryness and fluctuating clarity may occur during the first hours and should gradually improve.

Corneal-flap considerations

Follow-up course: the surgeon checks flap position, the corneal surface and visual acuity and provides eye-drop and follow-up instructions.

Ocular surface status

Persistent dryness: longer ocular-surface treatment or adjustment of lubricating therapy may be required.

Refractive measurement

Clinically significant residual refractive error: enhancement is considered only after measurements become stable and the eye is reassessed.

Realistic expectations

Severe pain, sudden visual decline, marked redness, discharge or worsening rather than improvement requires urgent ophthalmic assessment.

Symptoms requiring urgent care

Long-term care: routine eye examinations remain necessary because refractive surgery does not replace monitoring of the retina, intraocular pressure, lens or ocular surface.

Femto LASIK is selected after a diagnostic assessment, not by the technology’s name.

For one patient, the rapid recovery associated with a flap-based method may be an advantage. For another, avoiding a corneal flap or preserving more of the anterior stroma may be more important.

The purpose of the preoperative assessment at KazRIED is therefore not simply to confirm eligibility for laser vision correction, but to determine which technique offers an acceptable balance of effectiveness, biomechanical safety, visual quality, and suitability for the individual patient’s lifestyle.