Unfortunately, keratometric index is very imprecise in those cases in which there has been an alteration of the corneal surface, as, for example, after photorefractive
Because that the phase matching of degenerate operation for such a PPLN with 31 [micro]m grating period is realized at the temperature of 94[degrees]C, we used an oven to heat the MgO:PPLN, which can also limit the amount of photorefractive
damage caused by the strong 1 [micro]m pump.
Animal experimental studies revealed that topical application of NGF accelerated restoration of corneal sensitivity and promoted cornea epithelial proliferation and nerve regeneration after laser in situ keratomileusis (LASIK) or photorefractive
keratectomy (PRK) [85-87].
Currently, it is being treated successfully with refractive surgeries like laser in situ keratomileusis (LASIK), for low to moderate myopia,2 and photorefractive
keratectomy (PRK), Phakic intraocular lens (PIOL) implantation or refractive lens exchange (RLE) for those with moderate to high myopia.3
Its human trial was conducted in patients who had photorefractive
Siganos, "Excimer laser in situ keratomileusis and photorefractive
keratectomy for correction of high myopia," Journal of Refractive and Corneal Surgery, vol.
The strontium barium niobate [Sr.sub.x][Ba.sub.1-x][Nb.sub.2][O.sub.6] (SBN) nanocrystals have exhibited a variety of ferroelectricity [2-4], photorefractive
, electrooptic, nonlinear optical [1, 6], and thermoelectric properties  which are potentially important for many applications in various fields.
in 1996 used the phase mask method to write uniform photorefractive
Holographic three-dimensional telepresence using large-area photorefractive