Dodick photolysis for cataract surgery

Kanellopoulos, Anastasios John; Dodick, Jack M.; Brauweiler, P.; Alzner, E.

doi:10.1016/s0161-6420(99)90505-5

Cited by 25 publications

(7 citation statements)

References 30 publications

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“…Since 1999, sleeveless phaco tip has been used to perform bimanual phacoemulsification that uses corneal incisions smaller than 1.5 mm [2,3]. Considerable interest has been focused on neodymium:YAG laser surgery to extract the lens through an ultrasmall incision of less than 1.5 mm [4].…”

Section: Introductionmentioning

confidence: 99%

Comparison of peristaltic and Venturi pumps in bimanual microincisional cataract surgery

2008

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Comparison of peristaltic and Venturi pumps in bimanual microincision phacoemulsification on the success of the cataract surgery by using sleeveless phaco tip. Bimanual microincision phacoemulsification was done in 49 eyes using a 1.4-mm temporal clear corneal incision. A peristaltic pump was used in 23 eyes, and a Venturi pump was used in 26 eyes for phacoemulsification. Intraoperative complications, anterior chamber stability, and mean duration of surgery were recorded. Duration of surgery was shorter in the Venturi pump group. Anterior chamber stability could not be established in 17 eyes in the peristaltic pump group; it was established in all eyes in the Venturi pump group. Corneal burns were observed in two eyes in the peristaltic pump group and no eyes in the Venturi pump group. Use of a Venturi pump system and a vented gas-forced infusion system can significantly shorten surgery time and reduce risk of thermal burns.

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Section: Introductionmentioning

confidence: 99%

Comparison of peristaltic and Venturi pumps in bimanual microincisional cataract surgery

2008

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“…ECD was measured by specular microscopy (FA-3709, Konan Medical, Irvine, CA). Corneal thickness maps were obtained by anterior-segment optical coherence tomography (OCT, RtVue-100, Optovue, Fremont, CA) [ 6 ]. Keratometry was assessed via Scheimpflug-imaging topometry (Pentacam, Oculus Optikgeräte GmbH, Wetzlar, Germany).…”

Section: Methodsmentioning

confidence: 99%

“…Poor wound integrity and subclinical wound leaks from clear-cornea incisions have been associated with an increased rate of endophthalmitis [ 2 – 5 ]. The quest for smaller incisions and reduced energy has been continuous and also reported by our team [ 6 , 7 ] yet the current procedure’s outcome largely depends on surgeon skills and experience. Inconsistent capsulorhexis (continuous curvilinear capsulotomy), intraocuLar lens (IOL) tilt and decentration as well as posterior capsule opacification may lead to residual refractive error and to compromised visual rehabilitation [ 8 – 14 ].…”

Section: Introductionmentioning

confidence: 98%

Standard manual capsulorhexis / Ultrasound phacoemulsification compared to femtosecond laser-assisted capsulorhexis and lens fragmentation in clear cornea small incision cataract surgery

Kanellopoulos

Asimellis

2016

Eye and Vis

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BackgroundFemtosecond-laser assisted clear cornea cataract surgery may hold promise in safer and more effective procedures. We decided to perform a comparative study to standard manual incision phacoemulsification surgery.MethodsThis is a single-center, single-intervention, and prospective comparative data evaluation of 133 consecutive cases subjected to cataract surgery. Group-A (Phaco), manual capsulorhexis & ultrasound phacoemulsification (n = 66); Group-B femtosecond-laser assisted capsulorhexis and lens fragmentation (n = 67), employing the LenSx laser (Alcon Surgical, Ft. Worth, TX). All cases were evaluated for refraction, visual acuity, keratometry, tomography, pachymetry, endothelial cell counts, intraocular pressure, and type of intraocular lens (IOL) implanted. The groups were matched for age, gender, pre-operative vision metrics, and cataract grade, and were followed up to 1 year.ResultsIn group-A post-operative uncorrected distance visual acuity (UDVA) was 20/20 or better in 61.5 % and 20/25 or better in 78.5 % of the eyes. The femtosecond laser group-B had improved outcomes (p = 0.075 and p = 0.042, respectively): post-operative UDVA was 20/20 or better in 62.7 % of the eyes and 20/25 or better in 85.1 %.Linear regression scatterplots of achieved versus attempted spherical equivalent had excellent regression coefficients (r2 = 0.983 in group-A and 0.979 in group-B). There were 75.2 % cases in group-A and 80.6 % in group-B (p = 0.8732) within ±0.50 D of targeted refractive equivalent. Slight trend of under-correction was noted in group-A. Average residual manifest cylinder in the toric subgroup-A was -0.50 D (95 % Limit-of-Agreement (LoA) = -0.78 D), and in toric subgroup-B -0.45 D (LoA = -0.45 D).ConclusionsMean spherical equivalent refraction and visual acuity are comparable with laser cataract surgery compared with manual capsulorhexis & ultrasound phacoemulsification. Improved astigmatism correction may be among the benefits of femtosecond laser–assisted cataract surgery. Transient corneal edema may be a first day transient disadvantage in femtosecond laser–assisted cataract surgery.

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“…Cataract laser surgery is gaining momentum. Initially introduced in cataract surgery by Dodick in 1991 ( 11 , 12 ), this technique appears to be safer and causes less damage to the corneal endothelium, thereby allowing for better visual rehabilitation.…”

Section: Introductionmentioning

confidence: 99%

Qualitative and quantitative endothelium changes after cataract surgery: ultrasound phacoemulsification vs. nanolaser technique

Zbiba,

Kharrat,

Sayadi

et al. 2023

Front. Med.

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PurposeThe aim of this study was to evaluate corneal endothelial cell density and morphology, central corneal thickness, and best visual acuity using ultrasound (US) phacoemulsification or nanosecond laser technique.SettingDepartment of ophthalmology, Nabeul, Tunisia.DesignProspective cohort study.MethodsThis study included eyes with nuclear cataracts with a density grade of 1, 2, 3, or 4 according to LOCS III, divided into two groups; group 1 had conventional US, and group 2 had nanosecond laser. The endothelial cell density (ECD), coefficient of variation (CoV) in cell size, percentage of hexagonal cells, central corneal thickness (CCT) and best visual acuity (VA) were evaluated during 24 months.ResultsSeventy-four eyes had uneventful surgery, 40 in group 1, 34 in group 2. Three procedures in group 2 required conversion to standard phacoemulsification. The mean ECD decreased from 2616.4 ± 194.6 cells/mm2 in group 1 preoperatively to 2088.4 ± 229.9 after 2 years. In group 2, it decreased from 2611.8 ± 186.5 cells/mm2 to 2276.4 ± 163.8 after 2 years. The change was statistically significant in both groups. The decline of the mean ECD in group 2 was significantly less important than in group 1 (p = <10−2). The mean percentage of hexagonal cells was 45.18 ± 4.9 preoperatively and 43.5% ± 6.6 after 2 years in group 1. In group 2, it remained almost stable with 45.6 ± 5.1 and 45.4% ± 6.6 preoperatively and after 2 years, respectively. Preoperatively, the mean CoV was 0.39 ± 0.037 in group 1 and 0.38 ± 0.04 in group 2. After 2 years, it was 0.38 ± 0.04 and 0.37 ± 0.038 in group 1 and group 2, respectively. The changes of the mean CoV and the mean percentage of hexagonal cells were significant in both groups, but the difference between the groups was significant only during the six first months postoperatively. In preoperative, the mean corneal central thickness was 509.7 ± 19.5 in group 1 and 510.3 ± 20.4 in group 2. In both groups, the mean corneal thickness increased on D1 postoperatively to 550.9 in group 1, and 528.2 in group 2. The mean corneal thickness decreased more rapidly after 1 week in group 2, to find the initial values. Visual acuity improved from 0.76 Log Mar ± 0.5 at enrolment to 0.45 Log Mar ± 0.2, and 0.033 Log Mar ± 0.086 in group 1 at 1 day post-operative and after 24 months, respectively and from 0.58 Log Mar ± 0.28 to 0.2 Log Mar ± 0.09 and 0.035 Log Mar ± 0.083, respectively in group 2. There was no significant difference in VA at each follow-up between groups except for day 1.ConclusionOur study showed lower corneal tissue trauma, and lower endothelial cell loss in the laser cataract surgery compared to phacoemulsification.Clinical trial registration: (https://classic.clinicaltrials.gov/ct2/show/NCT05886283), identifier NCT05886283.

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Dodick photolysis for cataract surgery

Cited by 25 publications

References 30 publications

Comparison of peristaltic and Venturi pumps in bimanual microincisional cataract surgery

Comparison of peristaltic and Venturi pumps in bimanual microincisional cataract surgery

Standard manual capsulorhexis / Ultrasound phacoemulsification compared to femtosecond laser-assisted capsulorhexis and lens fragmentation in clear cornea small incision cataract surgery

Qualitative and quantitative endothelium changes after cataract surgery: ultrasound phacoemulsification vs. nanolaser technique

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