scholarly journals A Comparative Study of Two Types of Implantation Surgery Methods for Implantable Collamer Lenses

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Hao Liu ◽  
Denghao Dong ◽  
Chunlin Chen ◽  
Jian Ye
Keyword(s):  
Visual Acuity ◽  
Endothelial Cell ◽  
Cell Count ◽  
Anterior Chamber ◽  
Operation Time ◽  
Corneal Endothelial Cell ◽  
Distance Visual Acuity ◽  
Endothelial Cell Count ◽  
Group 2 ◽  
Group 1

Purpose. To investigate the effects of two different surgical methods of implantable collamer lens (ICL) implantation on the operation time, visual outcomes, corneal endothelial cell count, and intraocular pressure (IOP). Methods. This was a contralateral eye comparison study, a total of 192 eyes from 96 patients were included, and the two eyes from the same patient were randomly assigned to two groups (group 1 and group 2, with 96 eyes in each group). In group 1, after making the corneal incision, ophthalmic viscosurgical devices (OVDs) were first injected into the anterior chamber followed by ICL implantation. In group 2, the ICL was first implanted into the anterior chamber followed by OVDs injection. The operation time, uncorrected distance visual acuity, corrected distance visual acuity, spherical equivalent, corneal endothelial cell count, and IOP were recorded and analyzed. Results. The operative time in group 1 was significantly longer than that in group 2 ( P  = 0.002 < 0.05). There were significant differences between IOP measured 2 hours following surgery of the two groups ( P  = 0.026 < 0.05), Furthermore, the rate of IOP change 2 hours following the operation was significantly higher in group 1 than in group 2 ( P  = 0.019 < 0.05). There were significant differences in the anterior chamber angle 2 hours after surgery compared with that before surgery in both groups ( P  = 0.014 < 0.05 and P  = 0.029 < 0.05, respectively). No significant differences were observed in the other parameters measured (all P  > 0.05). Conclusion. The two ICL implantation methods had similar clinical outcomes and effects on the corneal endothelial cell count. Additionally, the implantation of an intraocular lens prior to injecting OVDs reduces the operation time and lowers the rate of IOP rise in the early postoperative period, making it safe and effective for ICL implantation.

scholarly journals Effect of donor and host factors on corneal graft transparency

2021 ◽  
Vol 6 (4) ◽  
pp. 56-61
Author(s):  
Dr. Amisha Jain ◽  
◽  
Dr. Hema Joshi ◽  
Dr. Nimish Jain ◽  
◽  
...  
Keyword(s):  
Endothelial Cell ◽  
Cell Count ◽  
Graft Survival ◽  
Graft Failure ◽  
Failure Group ◽  
Endothelial Cell Count ◽  
Donor Factors ◽  
Group 2 ◽  
Group 1

Objective: To study the correlation between donor factors and recipients' factors on graft clarity.Materials and methods: The study comprised 30 cases of Keratoplasty surgery with a follow up of6 months. All donor corneas were evaluated by Konan specular microscope for endothelial cellcount; details of the donor like age, cause of death were noted. The patients were divided into twogroups, Group 1 had graft failure, and Group 2 had clear corneas. Observation and Result: Therewere 12 patients in group 1 and 18 patients in group 2 with six months of follow up. The meanendothelial cell count in group 1 was 1942.3/mm2, and group 2 was 2334.8/mm2. There is asignificant difference in the mean endothelial cell count between the two groups. On analysing theindication for Keratoplasty in two groups, the outcome was best for the corneal opacity group duringworst for the graft failure group. Conclusion: Donor endothelial cell count significantly influencedgraft outcome; rest donor factors (age, death enucleation interval, enucleation surgery interval)don't affect graft survival. Indication for Keratoplasty is a significant predictor of graft survival.

Comparison between the protective effect of Ophthalmic Viscoelastics on the corneal endothelium in phacoemulsification

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
S M A Saleh ◽  
R M F Elghazawy ◽  
A I Elawamry ◽  
R G Zaki
Keyword(s):  
Visual Acuity ◽  
Endothelial Cell ◽  
Protective Effect ◽  
Cell Count ◽  
Corneal Endothelium ◽  
Hydroxypropyl Methylcellulose ◽  
Methyl Cellulose ◽  
Endothelial Cell Count ◽  
Significant Difference ◽  
Group 2

Abstract Background Phacoemulsification is one of the most common surgical interventions done worldwide; the ultrasound power used to emulsify and remove the cataractous lens is hazardous to corneal endothelium and can lead to permenant damage. Thats why ophthalmic viscoelastics have been developed and used to protect the corneal endothelium and ensure safety of intraocualr surgeries. Objective To study the effect of different concentrations of methyl cellulose on the corneal endothelium during phacoemulsification using specular microscopy. Patients and Methods Sixty patients with Immature Senile Cataract (IMSC) are equally distributed into two groups according to the concentration of Hydroxypropyl Methylcellulose (HPMC) used during phacoemulsification. In the first group HPMC 2% was used and in the second group HPMC 2.4% was used. Preoperative and one month postoperative examination was done including visual acuity testing, slit lamp examination using Topcon SL-3C, intraocular pressure measurement using Goldmann Applanation Tonometer (GAT), fundus examination, corneal edndothelium assessment by Tomey Specular Microscope EM-3000. Results Preoperatively, no significant difference was observed in age, sex, visual acuity, introcular pressure and endothelial cell count among the two groups. Postoperatively, the two groups had a significant decrease in endothelial cell count, but the decrease was less in group 2 using Methyl cellulose 2.4% (13.494%) than in group 1 using Methyl cellulose 2% (14.515%).There was an equal and significant increase in visual acuity in the two groups. Discussion Many studies have been done to compare the efficacy of different viscoelastics (OVDs) in the protection of corneal endothelium during phacoemulsification. In our study we compared the protective effect of two different concentrations of HydroxyPropyl MethylCellulose (2% &2.4%) on the corneal endothelium during phacoemulsification. We compared the demographic data as regarding age and sex of the patients in the two groups, also we compared the preoperative endothelial cell count in the two groups using Specualr Microscopy and the result showed no significant difference between the 2 groups. The endothelial cell loss was comparable in the 2 groups, in group 1 it was 362.267 ± 52.020 (14.515 % ± 1.458) and in group 2 it was 335.667 ± 21.170 (13.494% ±0.667) with slightly better protection in the second group. So these results shows that HPMC 2.4% gives better protection than HPMC 2% on corneal endothelium during phacoemulsification on terms of the postoperative endothelial cell count and the endothelial loss after phacoemulsification. Many studies have been done to compare the efficacy and the protective effect of different viscoelastics during phacoemulsification for example the studies done by Miller et al, Maar et al, Vajpayee et al and Storr-Paulsen et al, these studies showed results similar to our study as regards the protective effect of methyl cellulose with its different concentrations on the corneal endothelium during phacoemulsification, so both concentrations (2% and 2.4%) can be used safely and effectively in phacoemulsification to decrease the endothelial loss and ensure patients safety. Conclusion Methyl cellulose 2.4% and Methyl cellulose 2% were comparable in their ability to protect the corneal endothelium during phacoemulsification, in general both viscoelastics can be efficiently and safely used in performing phacoemulsification.

Corneal Endothelial Cell Count in Keratoconus Patients After Contact Lens Wear

2004 ◽  
Vol 30 (1) ◽  
pp. 54-58 ◽  
Author(s):  
Charles R. Edmonds ◽  
Shu-Fen Wung ◽  
Marla J. Husz ◽  
Bart Pemberton
Keyword(s):  
Endothelial Cell ◽  
Cell Count ◽  
Contact Lens ◽  
Corneal Endothelial Cell ◽  
Contact Lens Wear ◽  
Endothelial Cell Count ◽  
Lens Wear

scholarly journals The kebab technique uses a bipolar pencil to retrieve a dropped nucleus of the lens via a small incision

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hiroshi Aso ◽  
Harumasa Yokota ◽  
Hirotsugu Hanazaki ◽  
Satoru Yamagami ◽  
Taiji Nagaoka
Keyword(s):  
Endothelial Cell ◽  
Cell Count ◽  
Acute Angle ◽  
Corneal Endothelial Cell ◽  
Angle Closure ◽  
Endothelial Cell Count ◽  
Small Incision ◽  
Before And After ◽  
Phacolytic Glaucoma ◽  
The Mean

AbstractWe developed a new method to retrieve a dropped nucleus of the lens via a small incision using bipolar pencils, the kebab technique, to solve the lack of small-gauge fragmatomes, and the expense and toxicity of perfluorocarbon liquids (PFCL). A total of 8 eyes in 6 patients underwent this technique and were reviewed. After vitrectomy, the dropped nucleus of the lens was lifted from the retina by adhesion with a bipolar pencil, and phacoemulsification was performed while rotating the lens. The outcome measures were best-corrected visual acuity (BCVA), intraocular pressure (IOP), and corneal endothelial cell density before and after surgery. Surgical indications included zonular weakness, trauma, acute angle closure attack, and phacolytic glaucoma. At 1 month, BCVA improved from a mean (standard deviation, SD) 1.67 logMAR (0.90) to 1.14 logMAR (1.01). The mean preoperative IOP was 24.5 (16.8) mmHg and postoperative IOP was 11.0 (2.8) mmHg. The mean preoperative corneal endothelial cell count was 2600 (322) cells/mm2 (one eye was unmeasurable) and postoperative corneal endothelial cell count was 2387 (431) cells/mm2. There were no postoperative complications. The retrieval of a dropped nucleus of the lens using a bipolar pencil enables small incisions without using PFCL.

scholarly journals The Kebab Technique: Using a Bipolar Pencil to Retrieve a Dropped Nucleus via a Small Incision

2020 ◽  
Author(s):  
Hiroshi Aso ◽  
Harumasa Yokota ◽  
Hirotsugu Hanasaki ◽  
Satoru Yamagami ◽  
Taiji Nagaoka
Keyword(s):  
Intraocular Pressure ◽  
Endothelial Cell ◽  
Cell Count ◽  
Acute Angle ◽  
Corneal Endothelial Cell ◽  
Angle Closure ◽  
Endothelial Cell Count ◽  
Small Incision ◽  
Before And After ◽  
The Mean

Abstract We developed a new method to retrieve a dropped nucleus via a small incision using bipolar pencils, the kebab technique, to solve the lack of small-gauge fragmatomes, and the expense and toxicity of perfluorocarbon liquids (PFCL). A total of 8 eyes in 6 patients underwent this technique and were reviewed. After vitrectomy, the dropped nucleus was lifted from the retina by adhesion with a bipolar pencil, and phacoemulsification was performed while rotating the lens. The outcome measures were best-corrected visual acuity (BCVA), intraocular pressure (IOP), and corneal endothelial cell density before and after surgery. Surgical indications included zonular weakness, trauma, acute angle closure attack, and phacolytic glaucoma. At 1 month, BCVA improved from a mean ± SD 1.67 logMAR (± 0.90) to 1.14 logMAR (± 1.01). The mean preoperative intraocular pressure (IOP) was 24.5 (± 16.8) mmHg and postoperative IOP was 11.0 (± 2.8) mmHg. The mean preoperative corneal endothelial cell count was 2600 (322) cells/mm2 (one eye was unmeasurable) and postoperative corneal endothelial cell count was 2387 (± 431) cells/ mm2. There were no postoperative complications. The retrieval of a dropped nucleus using a bipolar pencil enables small incisions without using PFCL.

scholarly journals A Comparative Study of Corneal Endothelial Cell Count and Central Corneal Thickness in Emmetropia and Axial Myopia

2020 ◽  
Vol 9 (44) ◽  
pp. 3300-3304
Author(s):  
Vandana Panjwani ◽  
Sachin Daigavane
Keyword(s):  
Endothelial Cell ◽  
Comparative Study ◽  
Cell Count ◽  
Axial Length ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Corneal Endothelial Cell ◽  
Specular Microscopy ◽  
Endothelial Cell Count ◽  
Axial Myopia

BACKGROUND The main attributes of cornea which makes it optically important is its ability to maintain its dehydrated state. This corneal dehydration can be achieved and maintained by various factors among which corneal endothelial cell count and morphology play a significant role. Corneal attributes considered in this study i.e. the corneal endothelial cell count and central corneal thickness are extremely variable, and changes are seen even with smaller changes in anterior segment or overall structural changes in eyes. We wanted to compare central corneal thickness in emmetropia and axial myopia and compare corneal endothelial cell count in emmetropia and axial myopia. METHODS The sample size was decided taking into consideration various prevalence studies. The patients were consecutively recruited for the study considering the inclusion and exclusion criteria. The subjects were divided into two groups emmetropia and axial myopia and were differentiated on the basis of the axial lengths. Specular microscopy was performed for the subjects and corneal endothelial cell count, morphology and central corneal thickness were measured, and comparative study was performed. RESULTS This study of 80 eyes shows us that the difference between mean the corneal endothelial cell count between emmetrope (2812.80 cells / mm2) and axial myopes (2653 cells / mm2) is statistically significant where p was < 0.05 while the mean central corneal thickness measurements didn’t show statistically significant change between emmetrope (490.05 microns) and axial myope. (489.37 microns). CONCLUSIONS Axial length has an indirect correlation with the corneal endothelial cell count which is statistically significant. While significant correlation between the central corneal thickness and axial length cannot be established in this study. KEY WORDS Emmetropia, Axial Myopia, Corneal Endothelial Cell Count, Central Corneal Thickness, Comparison

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