Corneal Surgery

Corneal surgery includes curative or therapeutic procedures and refractive procedures (Fig. 5.18).

❖ Curative corneal procedures are intended to improve vision by eliminating corneal opacification.

- Therapeutic and refractive corneal procedures.

Therapeutic procedures

Penetrating keratoplasty

Lamellar keratoplasty a

Lamellar keratoplasty b

Phototherapeutic keratectomy

Phototherapeutic keratectomy

Refractive procedures

Photorefractive keratectomy

Radial keratotomy

Refractive procedures

Photorefractive keratectomy

Radial keratotomy d

Keratotomy correction of astigmatism Holmium laser correction of hyperopia d

Keratotomy correction of astigmatism Holmium laser correction of hyperopia

Epikeratophakia

Epikeratophakic keratoplasty

Epikeratophakia

Epikeratophakic keratoplasty h

Excimer laser insitu keratomileusis (LASIK)

Excimer laser insitu keratomileusis (LASIK)

Figs. 5.18a-i See explanations in text.

= Excimer laser b a

❖ Refractive corneal procedures change the refractive power of a clear cornea.

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