准分子激光器和多焦点角膜消融
Alarcón等通过使用射线描绘来评估多灶性角膜的不同理论模型，用于通过激光扫描来校正老花眼。由于瞳孔的大小随着住宿而减少，因此研究人员优先于中央模型，以获得2.4mm中心区直径的最佳多焦点，与2.9mm中心区的外围模型。应当注意，尽管近似视力更好，但这些模型提供的距离视觉的质量比超越偏心眼更差。
在临床试验中进行12个月显示非球面波前导液的结果，以治疗远视老化的高度老花眼。他们使用Visx Star S4 IR（Abbott Medical Optics Inc.）治疗了33名患者的66只眼睛。术后六个月，平均校正距离视力为20/20 + 1，视力附近校正的距离为2.7±1.7，最大近似视力下6线改善。12个月，100 {0730ED075B45D9E50C00D6CD42DD08773E0164F29A45151808BF8905151808BF8905151808BF8905151808BF89051290974}患者达到了20/25或更高的双目同时UCVA和J3。负球面像差与视力附近校正的距离的术后改善高度相关。在他们的结论中，研究人员表示，在视力附近术前校正术前术术术术术术远远或更大减少的患者更可能具有整体满意度。
178名连续患者使用Wawelight Allegretto Comimer激光（Alcon Laboratories，Inc。）接受了178名连续患者的图表审查。患者具有常见的屈光误差偏离误差，近视高达-5.00天，或远高达+ 3.00天的远视，不超过3.00 d散光。102例至少3个月的术后随访，81 {0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974}具有20/20或更好，98 {0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974}双目距离裸眼视力看到20/25或更好。此外，44 {0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974}实现J1双眼视力附近，60 {0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974} J2和96 {0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974} J3或更好。
Another clinical trial presented early outcomes of Intracor femtosecond laser treatment for presbyopia. The investigators treated the nondominant eye of 25 patients using the Technolas Perfect Vision femtosecond laser (Technolas Perfect Vision GmbH). The procedure involves the creation of five consecutive intrastromal rings around the line of sight. Treatment times were approximately 20 seconds. The mean gain in UCVA was 4.42 lines, with a range of 0 to 9 lines of improvement. The mean loss of distance BCVA was -0.46 ±0.83.9 Similarly, Ruiz et al evaluated 83 eyes of 45 patients with 6- to 12-month follow-up. Of the 83 eyes, 89.2{0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974} achieved both J2 and 20/25 or better, and 69.9{0730eed075b45d9e50c00d6cd42dd08773e0164f29a45151808bf89051290974} achieved a near UCVA of J1. This technology has the advantage of being minimally invasive, with a rapid effect manifesting within minutes to several hours. Further investigation of long-term stability is ongoing.
来自菲律宾的安全研究的相关数据通过Harvey S. UY，MD。十四名患者在45至60岁之间，BCVA的20/40或更好的BCVA，没有大于2年级的白内障，并最初同意白内障手术。所有接受单方面的单方面待遇，可选择在一次后续后续后续到白内障手术。早期结果显示1个月内没有进步性白内障地层。
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