The above picture is the appearance of the cornea immediately following a procedure. a. What is the name of this procedure? b. What was the likely refractive error of this patient?
a. What is the name of this procedure?
b. What was the likely refractive error of this patient?
Answer a Laser thermal keratoplasty. The procedure can be performed with holmium laser. This involves placing two concentric eight-spot rings on the cornea, with diameters of 6 and 7 mm. Seven pulses at a frequency of 5 Hz were used, with pulse energy of 226 to 258 mJ.k Answer b Hypermetropia. Laser thermal keratoplasty steepens the central cornea and increases its converging power so that the image is focused more anteriorly.k
Answer b Hypermetropia. Laser thermal keratoplasty steepens the central cornea and increases its converging power so that the image is focused more anteriorly.k
