{'fraction_non_alphanumeric': 0.045454545454545456, 'fraction_numerical': 0.03787878787878788, 'mean_word_length': 5.156779661016949, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 1, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Portable Microkeratome-based Anterior Corneal Surface Harvesting Device

Purpose. To determine the reproducibility of anterior sclerokeratectomy using a portable nonelectric microkeratome-based device capable of harvesting the entire anterior corneal surface for lamellar transplantation. Methods. A modified gas turbine-driven microkeratome (LSK One, Moria/Microtech, Doylestown, PA) with a redesigned head large enough to incorporate the whole human anterior corneal surface in a pass and was coupled to a manual vacuum pump. This instrument was tested on 25 fresh porcine globes divided into 2 groups (170-&mgr;m and 200-&mgr;m head). To assess cut reproducibility the physical dimensions (diameter and thickness) of the obtained lenticules were measured. Results. The obtained lenticules were fairly circular (horizontal versus vertical diameters, p >0.2), with average diameters of 12.85 ± 0.52 mm and 13.25 ± 1.15 mm for the 170 and 200-&mgr;m heads, respectively. The average central lenticule thickness was 176.92 ± 34.68 &mgr;m and 166.00 ± 53.74 &mgr;m for the 170 and 200-&mgr;m heads, respectively. Conclusion. This new system presents an economical and portable alternative to electric-powered systems. In addition to being used by surgeons in the operating room, eye bank technicians in the field could theoretically use this system; including in developing countries where cost, availability of electricity, and portability are issues.