scholarly journals A pilot study: lenticule quality of hyperopic small incision lenticule extraction (SMILE) in rabbits

2020 ◽  
Author(s):  
Yu Zhao ◽  
Feng Zhao ◽  
Tian Han ◽  
Jing Zhao ◽  
Xingtao Zhou
Keyword(s):  
Surface Characteristics ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Left And Right ◽  
The Right ◽  
Almost All ◽  
Surgical Manipulation ◽  
Scanning Electron

Abstract Background: To evaluate lenticule surface characteristics of small incision lenticule extraction (SMILE) for hyperopia correction in rabbits. Methods: The left and right eyes of 8 rabbits were divided into two groups. The right eyes were assigned to a hyperopia group, and the left eyes to a myopia group. The rabbits received SMILE procedures with +3.00 D and –3.00 D correction for the hyperopia and myopia groups, respectively. Extracted lenticules were examined via scanning electron microscopy. Lenticules from odd-numbered rabbits were accessed with the anterior surface, and lenticules from even-numbered rabbits were observed with the posterior surface. A previously established scoring system was used to evaluate lenticule surface characteristics. Statistical analysis was conducted to compare the scores between the two groups. Results: All procedures were performed successfully, and the lenticules were extracted smoothly. One myopia lenticule that was facing downward was handled failed in preparation for imaging, thus 15 lenticules were ultimately graded. Twelve lenticules exhibited smooth surfaces, and regularly arranged tissue bridges were observed in almost all regions. Three lenticules exhibited a partially rough surface and irregularities affecting more than 10% of the lenticules (2 in the hyperopia group and 1 in the myopia group). Rough lenticules occurred in twice as many Lenticules in the hyperopia group compared to the myopia group. Conclusions: Scan quality of lenticules after SMILE for hyperopia correction is comparable to that of myopia lenticules. The shape of hyperopic lenticule may increase the difficulty of surgical manipulation and result in surface roughness.

scholarly journals A pilot study: lenticule quality of hyperopic small incision lenticule extraction (SMILE) in rabbits

2019 ◽  
Author(s):  
Yu Zhao ◽  
Feng Zhao ◽  
Tian Han ◽  
Jing Zhao ◽  
Xingtao Zhou
Keyword(s):  
Surface Characteristics ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Left And Right ◽  
The Right ◽  
Almost All ◽  
Surgical Manipulation ◽  
Scanning Electron

Abstract Purpose: To evaluate lenticule surface characteristics of small incision lenticule extraction (SMILE) for hyperopia correction in rabbits. Methods: The left and right eyes of 8 rabbits were divided into two groups. The right eyes were assigned to a hyperopia group, and the left eyes to a myopia group. The rabbits received SMILE procedures with +3.00 D and –3.00 D correction for the hyperopia and myopia groups, respectively. Extracted lenticules were examined via scanning electron microscopy. Lenticules from odd-numbered rabbits were accessed with the anterior surface, and lenticules from even-numbered rabbits were observed with the posterior surface. A previously established scoring system was used to evaluate lenticule surface characteristics. Statistical analysis was conducted to compare the scores between the two groups. Results: All procedures were performed successfully, and the lenticules were extracted smoothly. One myopia lenticule that was facing downward was handled failed in preparation for imaging, thus 15 lenticules were ultimately graded. Twelve lenticules exhibited smooth surfaces, and regularly arranged tissue bridges were observed in almost all regions. Three lenticules exhibited a partially rough surface and irregularities affecting more than 10% of the lenticules (2 in the hyperopia group and 1 in the myopia group). Rough lenticules occurred in twice as many Lenticules in the hyperopia group compared to the myopia group. Conclusions: Scan quality of lenticules after SMILE for hyperopia correction is comparable to that of myopia lenticules. The shape of hyperopic lenticule may increase the difficulty of surgical manipulation and result in surface roughness.

scholarly journals A pilot study: lenticule quality of hyperopic small incision lenticule extraction (SMILE) in rabbits

2020 ◽  
Author(s):  
Yu Zhao ◽  
Feng Zhao ◽  
Tian Han ◽  
Jing Zhao ◽  
Xingtao Zhou
Keyword(s):  
Surface Characteristics ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Left And Right ◽  
The Right ◽  
Almost All ◽  
Surgical Manipulation ◽  
Scanning Electron

Abstract Background: To evaluate lenticule surface characteristics of small incision lenticule extraction (SMILE) for hyperopia correction in rabbits.Methods: The left and right eyes of 8 rabbits were divided into two groups. The right eyes were assigned to a hyperopia group, and the left eyes to a myopia group. The rabbits received SMILE procedures with +3.00 D and –3.00 D correction for the hyperopia and myopia groups, respectively. Extracted lenticules were examined via scanning electron microscopy. Lenticules from odd-numbered rabbits were accessed with the anterior surface, and lenticules from even-numbered rabbits were observed with the posterior surface. A previously established scoring system was used to evaluate lenticule surface characteristics. Statistical analysis was conducted to compare the scores between the two groups.Results: All procedures were performed successfully, and the lenticules were extracted smoothly. One myopia lenticule that was facing downward was handled failed in preparation for imaging, thus 15 lenticules were ultimately graded. Twelve lenticules exhibited smooth surfaces, and regularly arranged tissue bridges were observed in almost all regions. Three lenticules exhibited a partially rough surface and irregularities affecting more than 10% of the lenticules (2 in the hyperopia group and 1 in the myopia group). Rough lenticules occurred in twice as many Lenticules in the hyperopia group compared to the myopia group.Conclusions: Scan quality of lenticules after SMILE for hyperopia correction is comparable to that of myopia lenticules. The shape of hyperopic lenticule may increase the difficulty of surgical manipulation and result in surface roughness.

scholarly journals A pilot study: lenticule quality of hyperopic small incision lenticule extraction (SMILE) in rabbits

2019 ◽  
Author(s):  
Yu Zhao ◽  
Feng Zhao ◽  
Tian Han ◽  
Jing Zhao ◽  
Xingtao Zhou
Keyword(s):  
Surface Characteristics ◽  
Small Incision Lenticule Extraction ◽  
Future Studies ◽  
Small Incision ◽  
Significant Difference ◽  
Lenticule Extraction ◽  
Left And Right ◽  
The Right ◽  
Almost All

Abstract Purpose: To evaluate lenticule surface characteristics of small incision lenticule extraction (SMILE) for hyperopia correction in. Methods: The left and right eyes of 8 rabbits were divided into two groups. The right eyes were assigned to a hyperopia group, and the left eyes to a myopia group. The rabbits received SMILE procedures with +3.00 D and –3.00 D correction for the hyperopia and myopia groups, respectively. Extracted lenticules were examined via scanning electron microscopy. Lenticules from odd-numbered rabbits were accessed with the anterior surface, and lenticules from even-numbered rabbits were observed with the posterior surface. A previously established scoring system was used to evaluate lenticule surface characteristics. Statistical analysis was conducted to compare the scores between the two groups. Results: All procedures were performed successfully, and the lenticules were extracted smoothly. One myopia lenticule that was facing downward was handled failed in preparation for imaging, thus 15 lenticules were ultimately graded. Twelve lenticules exhibited smooth surfaces, and regularly arranged tissue bridges were observed in almost all regions. Three lenticules exhibited a partially rough surface and irregularities affecting more than 10% of the lenticules (2 in the hyperopia group and 1 in the myopia group). There was no significant difference between the scores of the surfaces of the lenticules in the two groups (p > 0.05). Conclusions: The surface quality of lenticules after SMILE for hyperopia correction may be comparable to that of myopia lenticules. Future studies should concentrate on the clinical effect of human hyperopia lenticules.

scholarly journals Corneal wavefront aberrations and subjective quality of vision after small incision lenticule extraction

2020 ◽  
Vol 98 (7) ◽  
Author(s):  
Jakob Siedlecki ◽  
Valerie Schmelter ◽  
Benedikt Schworm ◽  
Wolfgang J. Mayer ◽  
Siegfried G. Priglinger ◽  
...  
Keyword(s):  
Subjective Quality ◽  
Small Incision Lenticule Extraction ◽  
Wavefront Aberrations ◽  
Small Incision ◽  
Quality Of Vision ◽  
Lenticule Extraction

scholarly journals First Experience in Small Incision Lenticule Extraction with the Femto LDV Z8 and Lenticule Evaluation Using Scanning Electron Microscopy

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Mengmeng Wang ◽  
Fengju Zhang ◽  
Christine Carole Copruz ◽  
Longhui Han
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Peak Pressure ◽  
Laser System ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Level Laser ◽  
Lenticule Extraction ◽  
Time Parameters ◽  
Scanning Electron

Purpose. To evaluate the specifications and technique properties of the new Femto LDV Z8 in creating intrastromal refractive lenticules during small incision lenticule extraction (SMILE). Methods. Six enucleated porcine eyeballs were equally divided into two groups (Femto LDV Z8 or VisuMax) and were randomly assigned to three experienced refractive surgeons who performed SMILE on each group. Five intraoperative time parameters and surgeons’ satisfaction on the surgical procedure were compared between two groups. Postoperatively, the roughness of the lenticule surfaces and the irregularity of edges were observed by scanning electron microscopy (SEM) and were also compared between the two groups. Results. Longer time on suction peak pressure, total laser application, and total surgery were spent in the Femto LDV Z8 group as compared with the VisuMax group. The Femto LDV Z8 group applied OCT scanning and offsetting before performing the laser procedure, which expended more time for these crucial steps. The widest range of surgeons’ satisfaction scores was found in the step of lenticule interface identification of the Femto LDV Z8 group. The roughness scores of the anterior and posterior lenticule surfaces were statistically less in the Femto LDV Z8 group than in the VisuMax group (anterior, ×180, p=0.039; anterior, ×250, p=0.337; posterior, ×180, p=0.006; and posterior, ×250, p=0.007). Conclusions. Femto LDV Z8 showed promising performances as a novel SMILE equipment for the correction of myopia. It has special and unique features for SMILE procedures, which need more learning and researching processes. With its low-energy high-frequency nJ-level laser system, the Femto LDV Z8 provided smoother lenticule surface than VisuMax.

Sign in / Sign up

Export Citation Format

Share Document