bluuebunny/crossref_metadata_2025_split huggingface dataset:
Laser in situ Keratomileusis With the Nidek EC-5000 Excimer Laser for Astigmatism Greater Than 4.00 D
Authors: Lui Marcelo Mastromonico , Silas Marcia Ap Grandini , Apelbaum Benny , Oshima Akioshi 
Published: April 2021

ABSTRACT
PURPOSE: To evaluate laser in situ keratomileusis (LASIK) performed with the Nidek EC-5000 excimer laser in 66 astigmatic eyes with cylinder from 4.00 to 8.00 D.
METHODS: LASIK was performed with the Nidek EC-5000 excimer laser in 66 astigmatic eyes with cylinder from 4.00 to 8.00 D. Based on Chayet's nomogram, ablation zone diameters were 5.5 mm (steep meridian ablation) to 7.5 mm (flat meridian ablation). In eyes with simple myopic astigmatism, mixed astigmatism, and compound myopic astigmatism (low sphere), ablation was performed in both meridians. In eyes with simple hyperopic astigmatism, ablation was performed in the flat meridian alone. In eyes with compound hyperopic astigmatism, ablation zone diameter was 5.5 mm and the transition zone was 7.5 mm.
RESULTS: Uncorrected visual acuity was 20/40 or better in 89% of eyes and was equal to preoperative best spectacle-corrected visual acuity in 62% of eyes. No eyes lost lines of best spectacle-corrected visual acuity.
CONCLUSIONS: Using the Nidek EC-5000 excimer laser, we had satisfactory results in the treatment of astigmatic eyes with cylinder from 4.00 to 8.00 D, based on Chayet's nomogram. [J Refract Surg 2002:18(suppl):S321-S322]
Geometric Ray Tracing for Design of Customized Ablation in Laser in situ Keratomileusis
Authors: Ortiz Dolores , Saiz José M , González Francisco , Del Cotero José N Fernández , Moreno Fernando 
Published: April 2021

ABSTRACT
PURPOSE: By means of an individualized optical model of the visual system, a customized surgical correction is proposed to achieve emmetropia and best visual acuity.
METHODS: The study included 64 eyes with myopia or myopic astigmatism that underwent LASIK with the Nidek EC-5000 excimer laser. The mean age was 33 years (19 to 54 yr). Mean myopia was -3.70 D (0 to -7.50 D) and mean astigmatism was -0.90 D (0 to -4.00 D). The model included a personalized Le Grand eye model, a geometric ray tracing process, and a statistical study of postoperative corneal flattening. As a final result, the model provided an interval of corneal radius to be sculpted in the stroma to maximize visual acuity attainable without correction. The mean radius of the interval was used to obtain the sphere-cylinder correction.
RESULTS: In 100% of eyes with 0 to +0.50 D of residual spherical equivalent refraction (n=39), the sculpted radius was inside the surgical interval and in the 30% of the "non-satisfactory" surgeries (7/25 eyes) the sculpted radius was outside the interval.
CONCLUSIONS: An objective optical method has been developed to obtain a customized ablation for LASDI. [J Refract Surg 2002;18(suppl):S327-S331]
Bioptics in Phakic and Pseudophakic Intraocular Lens With the Nidek EC-5000 Excimer Laser
Authors: Zaldivar Roberto , Oscherow Susana , Piezzi Virginia 
Published: April 2021

ABSTRACT
PURPOSE: To evaluate predictability, safety, stability, and complications related to bioptics in patients that received phakic and those that received Pseudophakie intraocular lenses. Both groups had LASIK with the Nidek EC-5000 excimer laser following IOL implantation.
METHODS: We evaluated retrospectively 281 eyes of 196 patients with posterior chamber phakic implantation (ICL) and 64 Pseudophakie eyes of 55 patients. AU patients had LASIK 1 month or more after the first surgery. We used a treatment zone of 5.5 mm with a 7.00-mm transition zone. The flap was made with the Automated Corneal Shaper (ACS).
RESULTS: In the group of phakic ICL eyes with bioptics, preoperative mean spherical equivalent refraction was -5.50 D (range, -1.37 to -16.00 D). The first day after LASDX, mean spherical equivalent refraction was -0.06 D, and at 1 month, -0.40 D. In Pseudophakie bioptics eyes, preoperative mean spherical equivalent refraction was -2.61 D (range, +0.50 to -5.50 D). The first day after LASEK it was +0.27 D, and 1 month after LASDi it was +0.09 D. The incidence of complications was similar in both groups of patients. The most frequent complication was keratitis sicca (approximately 10% in each group). Interstitial edema (2.1%) was present only in phakic bioptics eyes. No retinal complications were observed. Refraction was stable 4 years after surgery. Target achieved refraction was ± 0.50 D, showing the predictability of the procedure.
CONCLUSIONS: Predictability and safety were demonstrated according to results and absence of severe complications related with this technique. Older patients did not develop more complications than younger people; dry eye incidence was similar in both groups. In extreme myopia patients did not present retinal complications related to surgical procedures. [J Refract Surg 2002;18(suppl): S336-S339]
Comparison of Laser in situ Keratomileusis Outcomes With the Nidek EC-5000 and Meditec Mel 70 Excimer Lasers
Authors: Merchea Mohan , Pieger Stefan , Bains Harkaran S 
Published: April 2021

ABSTRACT
PURPOSE: To report refractive outcomes of laser in situ keratomileusis (LASER) for myopia with and without astigmatism using the Nidek EC-5000 and Meditec Mel 70 excimer laser systems.
METHODS: A retrospective analysis of refractive outcomes with each laser was conducted. Approximately 5700 eyes treated for myopia and myopic astigmatism were analyzed. Preoperative sphere ranged from -0.25 to -15.50 D and cylinder ranged from -0.75 to -5.50 D. All statistical analyses were performed by Datagraph med version 2.8 refractive analysis software.
RESULTS: With the Nidek EC-5000 at 6 months after LASDC, mean spherical equivalent refraction was -0.24 D with 72% of eyes within ±0.50 D. In the Méditée cohort, the mean spherical equivalent was -0.54 D with 55% of eyes ±0.50 D.
CONCLUSION: Eyes treated for myopia and astigmatism with either of these lasers showed early refractive stability and similar efficacy. Higher incidences of epithelial ingrowth and haze were present in the Meditec treated eyes. [J Refract Surg 2002;18(suppl):S343-S346I
Predictability of Corneal Flap Thickness in Laser in situ Keratomileusis Using Three Different Microkeratomes
Authors: Shemesh Gabi , Dotan Gad , Lipshitz Isaac 
Published: April 2021

ABSTRACT
PURPOSE: To compare the accuracy and consistency of corneal flap thickness in the right and left eye created by three different widely used microkeratomes during consecutive laser in situ keratomileusis CLASIK).
METHODS: Corneal thickness of 132 eyes of 66 patients was measured preoperatively and intraoperatively. Corneal flap thickness was calculated by subtracting the corneal stromal thickness from the total corneal thickness. Three different microkeratomes were used for creating the corneal flap: Chiron Automated Corneal Shaper (ACS), Baush and Lomb Surgical Hansatome, and Nidek MK 2000 microkeratomes. The same surgeon performed all procedures on the right eye first and then on the left eye using the same blade and the same surgical technique.
RESULTS: Mean corneal flap thickness created by the ACS (160-µm depth setting) microkeratome was 128.30 ± 12.57 µm in the right eye and 122.96 ± 13.30 µm in the left eye. The Hansatome (160-µm depth plate) microkeratome created a flap of mean 141.16 ± 20.11 µm in the right eye and 120.95 ± 26.95 µm in the left eye, and the Nidek MK 2000 (130-µm depth plate) microkeratome created a flap of 127.25 ± 4.12 µm in the right eye and 127.54 ± 3.7 µm in the left eye.
CONCLUSION: Corneal flap thickness tended to be considerably thinner than expected on both eyes using the ACS and Hansatome. With the ACS and Hansatome, the difference in corneal flap thickness between the first and second operated eye was statistically significant. With the Nidek MK 2000 microkeratome, there was no statistically significant difference between the first and second operated eye and measurements were close to desired corneal flap thickness. Intraoperative pachymetry is recommended for every LASIK procedure. [J Refract Surg 2002;18(suppl):S347-S351]
Nidek MK 2000 Microkeratome Clinical Evaluation
Authors: Arbelaez Maria Clara 
Published: April 2021

ABSTRACT
PURPOSE: To evaluate flap dimension, flap thickness, hinge size, and cut deterioration with second blade use with the Nidek MK 2000 automatic microkeratome.
METHODS: The Nidek MK 2000 with different head options (130 and 160 µta) and suction rings (8.5 and 9.5 mm) was used during 328 consecutive LASIK procedures, reusing the blade for the second eye in the same patient. Flap diameter and hinge size were measured under microscopy with a Castroviejo caliper and thickness was calculated using the Pachete ultrasonic pachymeter.
RESULTS: The mean flap thickness was 116.03 ± 19.26 µm using the 130-µm head and 147.7 ± 21.74 µm using the 160-µm head. The average vertical flap size was 8.56 ± 0.36 mm with the 8.5-mm suction ring and 9.45 ± 0.32 mm with the 9.5-mm ring. The hinge size was 4.7 ± 0.72 mm. The second cut was thinner than the first; 14.7 µta average using the 130-µm head, and 19.1 µm average using the 160-µm head.
CONCLUSION: The Nidek MK 2000 microkeratome was simple, safe, predictable, and reliable for LASIK. [J Refract Surg 2002;18(suppl): S357-S360]
Use of Amino Acids in Refractive Surgery
Authors: Vinciguerra Paolo , Camesasca Fabrizio I , Ponzin Diego 
Published: April 2021

ABSTRACT
PURPOSE: To assess the influence of amino acid supplements on corneal fibroblast activity during corneal healing in patients with chronic ulcers, as well as after refractive surgery when delayed reepithelialization had been observed in the fellow eye.
METHODS: Studies were conducted in vitro on eye bank eyes, and in vivo. In vitro cultures of rabbit corneal fibroblasts were enriched with progressively higher concentrations of amino acids. The human eye bank cornea study involved corneal epithelium removal, with corneas kept for 7 days in standard storage medium, either simple or enriched with amino acids. Clinical studies included treatment of two groups: Group 1 included six eyes of six patients with chronic epithelial defects, resistant to usual treatment; Group 2 included 21 eyes of 21 patients with delayed re-epithelialization after PRK in the first eye (12 ± 3 days). Group 1 was treated for 1 month, and Group 2 received treatment preoperatively and postoperatively after surgery in the fellow eye until re-epithelialization was achieved. All patients received 13 amino acids and Vitamin C in three tablets, three times per day.
RESULTS: Cultures of rabbit corneal fibroblasts showed that progressively increasing amino acid supplements led to an increase in the percentage of fibroblasts. De-epithelialized human eye bank corneas incubated with amino acids showed thicker and better organized re-epithelialization when compared to corneas incubated in simple standard storage media. In the clinical study, five eyes in Group 1 showed substantial improvement, one eyes remained unchanged. All eyes in Group 2 showed complete re-epithelialization within 60 hours after surgery.
CONCLUSION: Results suggest improvement of re-epithelialization when an increase of serum and tear film amino acids is obtained through oral administration. [J Refract Surg 2002;18(suppl): S374-S377]
Effect of Volatile Compounds on Excimer Laser Power Delivery
Authors: Van Horn Stewart D , Hovanesian John A , Maloney Robert K 
Published: April 2021

ABSTRACT
PURPOSE: To determine whether vapors from perfume, hairspray, oil-based paint, or water-based paint affect excimer laser beam power delivery at the corneal surface.
METHODS: We measured the power delivery of an Apex Plus laser before, during, and after exposure to vapors from the following volatile compounds: three types of perfume, hair spray, an oilbased paint, and a water-based paint. A digital calorimeter was used to measure the steady-state beam power of the laser during laser discharge at the corneal plane. Multiple trials were run with each compound, and the change in laser energy over time was examined to determine if any of the compounds caused degradation of the laser optics.
RESULTS: The presence of a volatile compound in the room caused no change in mean laser energy in comparison to before and after the compound was present. However, perfumes caused a progressive decline in laser beam power throughout the trials. Controlling for this progressive decline, there was no significant difference from perfume to perfume.
CONCLUSIONS: None of the compounds tested caused a decline in laser beam power while present in the room. However, the presence of any perfume caused a deterioration in beam power over time, suggesting a degradation of the laser optics for all perfumes. Laser centers should consider advising their patients and staff to not wear perfumes in the laser suite. [J Refract Surg 2002;18:524-528]
Intraoperative Corneal Topography for Image Registration
Authors: Schruender Stephan A , Fuchs Hendrik , Spasovski Saso , Dankert Andreas 
Published: April 2021

ABSTRACT
PURPOSE: To present a method to measure the three-dimensional shape of the cornea and to use the data for registration purposes in order to optimize ablation pattern alignment during corneal laser surgery.
METHODS: The three dimensional shape of the cornea can be measured with a modified fringe projection technique using UV laser pulses. A method to register these shape images is presented. The registration is done via established algorithms that use peripheral elevation data, which is not affected during the laser treatment. The method also provides a means to control the absolute amount of tissue removal. The three-dimensional registration method is compared with conventional two-dimensional eye tracking.
RESULTS: Due to the parallax of the cornea with respect to the pupil center, considerable decentration of laser ablation patterns can occur when tracking just the pupil center. Registration using three-dimensional shape measurements provides a more accurate means to control ablation pattern application.
CONCLUSIONS: A new method to register corneal shapes is discussed. It should allow monitoring the real ablation rate online during the treatment and might eventually serve as an online feedback system to control the laser ablationinduced corneal shape changes. [J Refract Surg 2002;18:S624-S629]
Rotoextractor Evacuation of Total Hyphema
Authors: Diddie Kenneth R , Ernest J Terry 
Published: April 2021

SUMMARY
Hyphema was created in ten albino rabbits and removed within an hour by the Douvas Rotoextractor. All the blood was gone from each eye within 48 hours and there was no evidence of damage to iris, cornea or lens after six weeks. One patient underwent Douvas Rotoextractor removal of a hyphema that was causing increased intraocular pressure and corneal staining. Three months postoperatively, vision was 6/7.5 and the intraocular pressure was controlled.
Immediate Fundus Complications After Retinal Scatter Photocoagulation I. Clinical Picture and Pathogenesis
Authors: Huamonte Felipe U , Peyman Gholam A , Goldberg Morton F , Locketz Alan 
Published: April 2021

SUMMARY
Fifty diabetics with severe background retinopathy or early proliferative retinopathy underwent retinal scatter photocoagulation with either the argon laser or the xenon arc photocoagu lators. Choroidal detachment, exudative retinal detachment, shallowing of the anterior chamber, and secondary angle-closure glaucoma were observed. Exudative retinal detachment and choroidal detachment subsided in two days to 2-1/2 weeks. Glaucoma secondary to choroidal detachment with angle closure was observed in 11 eyes, three of which required medical treatment, although surgical therapy was not needed. This secondary glaucoma was detected in the first two days and subsided in subsequent days, with intraocular pressure reaching pretreatment values at the fifth day. No long-term sequelae were observed in these complications, except in one eye that developed macular edema that lasted for four months with decreased visual acuity; nevertheless, vision returned to the pretreatment level one year after photocoagulation.
Punctal Occlusion with N-Butyl Cyanoacrylate Tissue Adhesive
Authors: Patten James T 
Published: April 2021

ABSTRACT
N-butyl cyanoacrylate tissue adhesive can be easily placed in the lid puncta to serve as a temporary method for punctal occlusion. Such a procedure is a useful therapeutic trial in borderline cases of keratoconjunctivitis sicca being considered for further permanent punctal occlusion or in patients where a temporary dry eye condition is expected to be resolved in the near future.
Penetrating Keratoplasty: A Computer Analysis
Authors: Ferguson James G , Mayer Walter 
Published: April 2021

ABSTRACT
A computer analysis of 87 penetrating kertoplasties done in a uniform manner by a single surgeon revealed the following: 1. On a statistical basis small grafts (7.0 mm) provided better visual acuity than larger grafts (8.0 mm). 2. On a statistical basis small grafts will be clearer postoperatively than larger grafts. 3. On a statistical basis the age of the donor is not related to either graft clarity or visual acuity.
Technique of Combined Lid and Medial Canthus Reconstruction
Authors: Tenzel Richard R , Boynton James R , Buffam Frank V 
Published: April 2021

SUMMARY
Standard lid reconstruction techniques (sliding flaps or tarsoconjunctival grafts) may be combined with the Laissez-Faire treatment of large medial canthal defects. Using this method, satisfactory results were achieved in three cases in which it was necessary to excise both a large portion of an eyelid and the adjacent medial canthus.
Monocular Aphakia and Contralateral Pseudophakia
Authors: Parelman Allen G 
Published: April 2021

SUMMARY
The implantation of an intraocular lens into the contralateral eye of nonimplanted monocular aphakic patients is reviewed. The specific indications, contraindications, and advantages are discussed. The results of a series of 31 cases are presented and analyzed. The generally good results and specific advantages of this technique, when utilized under proper conditions, indicate that it merits inclusion in the ever expanding spectrum of options available to the modern cataract surgeon.
The Efficacy of General Anesthesia for Cataract Surgery
Authors: Martin John J , Phiffer John L , Koch Walter E 
Published: April 2021

ABSTRACT
This is a report of 259 consecutive cataract extractions performed under general anesthesia over a two-year period. The age of the patients ranged from 6 to 93 with an average of 71.
The purpose of this paper is to reiterate the safety of modern general anesthesia for cataract extraction in the elderly, and to demonstrate it can provide a very soft eye in a completely immobilized patient It offers the most ideal conditions to the surgeon for lens extraction and careful wound closure without the necessity of retrobulbar block, digital massage or osmotic agents.
Combined Cataract Extraction and Thermal Sclerostomy versus Combined Cataract Extraction and Trabeculectomy
Authors: Stewart Robert Hampton , Loftis M Dean 
Published: April 2021

SUMMARY
We performed either a combined cataract extraction and trabeculectomy or a combined cataract extraction and thermal sclerostomy on 43 eyes. All eyes had chronic open angle glaucoma or chronic angle closure glaucoma, or a combination of the two. In our cataract/ trabeculectomy group, 74% had improvement in visual acuity, 91% had normalized intraocular pressure without antiglaucoma medications, 31% had transient postoperative hyphemas. In our cataract/thermal sclerostomy group, 61% had improvement in visual acuity, 61% had normalization of intraocular pressures without antiglaucoma medications, 17% had transient postoperative hyphemas. We could not correlate any of the complications of surgery with poor intraocular pressure results in either groups.
The mechanism for the higher success rate with a combined cataract extraction and trabeculectomy as compared with a combined cataract extraction and thermal sclerostomy was not obvious after analyzing these patients.
Repair of Marginal Furrow Perforation
Authors: Anderson Frank G 
Published: April 2021

SUMMARY
Limbus base lamellar scleral flap and fornix base conjunctival flap have been combined for repair of perforation secondary to Terrien's marginal furrow degeneration of the cornea Postoperative thinning of the flaps, Pseudopterygium extension, and other complications have not occurred.
Basal Cell Carcinoma Recurrence: Early Diagnosis and Surgical Treatment
Authors: Dizon Rutheva V , Shannon Gerard M , Siliquini John J 
Published: April 2021

SUMMARY
Twelve patients with twenty recurrent basal cell carcinomas of the lids and adnexa were studied. Observations on the behavior and treatment were discussed. Suggested management was also given. The radical aggressive approach towards these recurrent lesions is suggested, although initial excision of some basal cells need not be as radical.
As in all malignancies the prompt recognition of lesion, combined with appropriate treatment and regular follow-up are emphasized to effect a cure with good functional and cosmetic results.
Intraocular Lens Fixation with Dacron Mesh: Part I
Authors: Peyman Gholam , Koziol Jeffrey 
Published: April 2021

SUMMARY
Rabbits were used to demonstrate the feasibility of using Dacron fibers to fix intraocular lenses. Adhesion occurred five days after insertion and was confirmed by histologic examination to consist of fibroblastic ingrowth into the Dacron fibers. This cellular response was consistent and remained localized. Anterior and posterior placement of the acrylic portion of the lens was compared. It is our clinical impression that the risk of pupillary block is increased with posterior placement of the lens.
Corneal Edema: Iris-Clip Lens Implantation and Simple Intracapsular Extraction Compared
Authors: Cheng H , James A , Rubinstein B 
Published: April 2021

SUMMARY
Corneal edema following intracapsular lens extraction and iris-clip lens implantation was compared by assessing corneal thickness and epithelial edema. In a retrospective study the corneal thickness of twenty patients who had intracapsular lens extraction in one eye only was compared with twenty-six patients with iris-clip lens implants in one eye. There was no significant increase in corneal thickness in the operated eye in either group. In a prospective randomized controlled study, a smaller number of patients, had serial measurements of corneal thickness pre- and postoperatively. There was an increase in thickness in the immediate postoperative period for both groups. However, there was no significant difference between eyes which had simple extraction and those which had implants. The implanted eyes however had greater mean increase in corneal thickness and more widespread epithelial edema, suggesting greater endothelial trauma in the initial period, compared to eyes with cataract extraction alone.
Correction of Induced Astigmatism After Cataract Surgery With Introduction of an Intraocular Lens
Authors: Barron G J , Villaseñor R A , Weber Murry 
Published: April 2021

SUMMARY
1. The induced astigmatism is most frequently due to corneal scleral suturing and not tilting of the pseudophakos. 2. A simple method of reducing postoperatively induced corneal astigmatism after implantation of intraocular lens has been presented.
Ultrasonic Fragmentation for Retroimplant Membranes and Pupillary Block
Authors: Girard Louis J , Hawkins Rowland S , Borodofsky Ted 
Published: April 2021

SUMMARY
Retroimplant membranes may produce a reduction in vision and/or pupillary block glaucoma. Ultrasonic fragmentation through the pars plana is a quick and easy method for relieving the condition. The technique is described in six cases in which it has been used.