Laser vision correction technologies: from simple to complex

The Eye ◽  
2020 ◽  
Vol 22 (129) ◽  
pp. 48-50
Author(s):  
Tatiana Shilova

Laser vision correction is a simple and safe way to improve vision in cases of myopia, hyperopia and astigmatism. We analyzed differences of the existing laser vision correction technologies, their risks and side effects. The main objective of laser vision correction is to change corneal curvature in order to change its refractive power. Laser refractive surgery is the most common method of eliminating the need for glasses or contact lenses. The presented data was obtained from the analysis of scientific publications and by practical means.


The Eye ◽  
2020 ◽  
Vol 22 (130) ◽  
pp. 30-35
Author(s):  
Tatiana Shilova

Photorefractive keratectomy (PRK) is the first generation of laser vision correction, which marked the beginning of the era of laser keratorefractive surgery. The technology can improve vision in case of myopia, hypermetropia, and astigmatism. The article analyzes the advantages and disadvantages of the PRK method, its risks and side effects. The data obtained as a result of the analysis of scientific publications and by practical means are presented.



Author(s):  
V.D. Antonuk ◽  
◽  
T.S. Kuznetsova ◽  

Purpose. To evaluate the corneal biomechanical properties using the CORVIS ST device (Oculus, Germany) in patients with myopia and myopic astigmatism with intact cornea as well as in patients with myopia and myopic astigmatism who underwent excimer laser refractive surgery using femtolaser or microkeratome. Material and methods. Totally the study included 65 patients aged 18 years to 56 years with myopia and myopic astigmatism of various degrees were examined. They were scheduled for excimer laser refractive surgery after laser refractive surgery in different periods from 5 days to 5 years. Among the additional methods of examination, all patients were measured the biomechanical properties of the cornea using a CORVIS ST device (Oculus, Germany). Results. After excimer laser refractive surgery performing for myopia and myopic astigmatism correction, indicators of the corneal biomechanical properties, namely indicators describing stiffness and elasticity were changed, as well as IOP indicators. Conclusion. The biomechanical properties of the cornea, such as stiffness and elasticity, can be assessed using the CORVIS ST device (Oculus, Germany). After excimer laser vision correction of myopia and myopic astigmatism, corneal stiffness and elasticity decreases. IOP value in patients after excimer laser correction of myopia and myopic astigmatism decreases. It is associated with a decrease in corneal thickness but is not associated with a true decrease in IOP. Key words: biomechanical properties of the cornea, refractive surgery, excimer laser vision correction, femtolaser vision correction, myopia, myopic astigmatism.



The Eye ◽  
2020 ◽  
Vol 22 (130) ◽  
pp. 30-34
Author(s):  
Tatiana Shilova

Photorefractive keratectomy (PRK) is the first generation of laser vision correction, which marked the beginning of the era of laser keratorefractive surgery. The technology can improve vision in case of myopia, hypermetropia, and astigmatism. The article analyzes the advantages and disadvantages of the PRK method, its risks and side effects. The data obtained as a result of the analysis of scientific publications and by practical means are presented.



The Eye ◽  
2020 ◽  
Vol 22 (3(131)) ◽  
pp. 35-40
Author(s):  
T. Yu. Shilova

LASIK (Laser-Assisted in Situ Keratomileusis) is the second generation of laser vision correction methods, which replaced PRK (photorefractive keratectomy) and became a wide-spread method of laser keratorefractive surgery. The technology can improve vision in cases of myopia, hypermetropia, and astigmatism. The article analyzes the advantages and disadvantages of the LASIK method, its risks and side effects. Presented data is obtained from the analysis of scientific publications and by practical means.



1998 ◽  
Vol 14 (6) ◽  
pp. 631-635
Author(s):  
Efstathios T Detorakis ◽  
Dimitrios S Siganos ◽  
Vasilios M Houlakis ◽  
Vasilios P Kozobolis ◽  
Ioannis G Pallikaris


2015 ◽  
Vol 41 (9) ◽  
pp. 1826-1832 ◽  
Author(s):  
Guy M. Kezirian ◽  
Gregory D. Parkhurst ◽  
Jason P. Brinton ◽  
Richard A. Norden




2020 ◽  
Vol 68 (12) ◽  
pp. 2867
Author(s):  
Pooja Khamar ◽  
Rohit Shetty ◽  
VaitheeshwaranGanesan Lalgudi ◽  
Luci Kaweri ◽  
Urvija Choudhary ◽  
...  


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