<prompt> Radial keratotomy is used as treatment modality for:Small degree in myopiaProgressive non healing ulcerHigh astigmatismHigh hypermetropia  <response>: A i.e. Small degree myopia Radial Keratotomy is used for myopia of 1-6D.Q Treatment of Myopia Surgery Range of myopia Methods to induce flattening of central cornea 1. Radial keratotomy 1-6 D 2. Photorefractive keratotomy PRK 1-6 D 3. Automated lamellar keratectomy ALK 6-32 D 4. Excimer Laser Assisted Insitu Keratomileusis LASIK 2-12 D upto 30 D 5. LASEK 1-6 D 6. Intracorneal rings ICR 1-6 D Methods to reduce overall refractory power of eye 1. Clear lens extraction 15 D 