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1.  A survey of potential and previous cataract-surgery patients: what the ophthalmologist should know 
This study utilized a phone survey to characterize patient perceptions of cataract surgery and the manner in which the ophthalmologist contributes to the patient’s understanding in electing cataract surgery.
Patients and methods
Calls were made from a randomized membership list of the American Association of Retired Persons until 1,000 respondents 50 years of age or older had been recruited. Three groups were recruited: persons with no prior diagnosis of cataracts, persons diagnosed with cataracts but who had not had surgery, and persons who had had cataract surgery on both eyes within the past 5 years. A series of fixed-choice and open-ended questions was then presented to qualified participants. Questions related to vision, quality of life, and the understanding and perceptions of cataract surgery.
Two-thirds of respondents reported having frequent eye examinations. More than half indicated that they had discussed cataract surgery with an eye doctor, most often with an ophthalmologist. They reported that the benefits of surgery were most often mentioned (68%), but lens options were infrequently mentioned (39%). Of those who had had surgery, 81% elected to do so on the advice of their health care professional. About 85% of respondents who had had surgery felt well educated about the procedure, though only 75% felt they understood their lens and vision options. Three-quarters of those who had had cataract surgery wished they had had the surgery sooner, and reported that they were enjoying life more after surgery.
The ophthalmologist plays an important role in preparing patients for cataract surgery. Discussing both the timing of the surgery and the patient’s lens options are critical for appropriate care; the survey results suggest room for improvement in this regard. Respondents reported they wished they had had surgery sooner, based primarily on their improved quality of life postoperatively.
PMCID: PMC4154882  PMID: 25210427
cataract surgery; intraocular lens; perception; quality of life
2.  Comparative visual performance with monofocal and multifocal intraocular lenses 
To compare near, intermediate, and distance vision, and quality of vision using appropriate subjective questionnaires, when monofocal or apodized diffractive multifocal intraocular lenses (IOLs) are binocularly implanted.
Patients with different binocular IOLs implanted were recruited after surgery and had their visual acuity tested, and quality of vision evaluated, at a single diagnostic visit between 3 and 8 months after second-eye surgery. Lenses tested included an aspheric monofocal and two apodized diffractive multifocal IOLs with slightly different design parameters. A total of 94 patients were evaluated.
Subjects with the ReSTOR® +2.5 D IOL had better near and intermediate vision than those subjects with a monofocal IOL. Intermediate vision was similar to, and near vision slightly lower than, that of subjects with a ReSTOR® +3.0 D IOL implanted. The preferred reading distance was slightly farther out for the +2.5 D relative to the +3.0 D lens, and farthest for the monofocal. Visual acuity at the preferred reading distance was equal with the two multifocal IOLs and significantly worse with the monofocal IOL. Quality of vision measures were highest with the monofocal IOL and similar between the two multifocal IOLs.
The data indicate that the ReSTOR +2.5 D IOL provided good intermediate and functional near vision for patients who did not want to accept a higher potential for visual disturbances associated with the ReSTOR +3.0 D IOL, but wanted more near vision than a monofocal IOL generally provides. Quality of vision was not significantly different between the multifocal IOLs, but patient self-selection for each lens type may have been a factor.
PMCID: PMC3797652  PMID: 24143064
multifocal IOL; near vision; cataract; presbyopia
3.  Prospective study of toric IOL outcomes based on the Lenstar LS 900® dual zone automated keratometer 
BMC Ophthalmology  2012;12:21.
To establish clinical expectations when using the Lenstar LS 900® dual-zone automated keratometer for surgery planning of toric intraocular lenses.
Fifty eyes were measured with the Lenstar LS 900® dual-zone automated keratometer . Surgical planning was performed with the data from this device and the known surgically induced astigmatism of the surgeon. Post-operative refractions and visual acuity were measured at 1 month and 3 months.
Clinical outcomes from 43 uncomplicated surgeries showed an average post-operative refractive astigmatism of 0.44D ±0.25D. Over 70% of eyes had 0.50D or less of refractive astigmatism and no eye had more than 1.0D of refractive astigmatism. Uncorrected visual acuity was 20/32 or better in all eyes at 3 months, with 70% of eyes 20/20 or better. A significantly higher number of eyes had 0.75D or more of post-operative refractive astigmatism when the standard deviation of the pre-operative calculated corneal astigmatism angle, reported by the keratometer, was > 5 degrees.
In this single-site study investigating the use of the keratometry from the Lenstar LS 900® for toric IOL surgical planning, clinical outcomes appear equivalent to those reported in the literature for manual keratometry and somewhat better than has been reported for some previous automated instruments. A high standard deviation in the pre-operative calculated astigmatism angle, as reported by the keratometer, appears to increase the likelihood of higher post-operative refractive astigmatism.
PMCID: PMC3409075  PMID: 22800184
Toric IOL; Astigmatism; Cataract surgery; Cataract surgery planning; Keratometer; Lenstar LS 900®
4.  Minimizing Surgically Induced Astigmatism at the Time of Cataract Surgery Using a Square Posterior Limbal Incision 
Journal of Ophthalmology  2011;2011:243170.
Purpose. To compare the surgically induced astigmatism from clear corneal and square posterior limbal incisions at the time of cataract surgery. Methods. Surgically induced astigmatism was calculated for a set of eyes after cataract surgery using a temporal 2.2 mm square posterior limbal incision. Results were compared to similar available data from surgeons using clear corneal incisions of similar size. Results. Preoperative corneal astigmatism averaged 1.0 D and was not significantly different between the incision types. Surgically induced astigmatism with the 2.2 mm posterior limbal incision averaged 0.25 ± 0.14 D, significantly lower in magnitude than the aggregate surgically induced astigmatism produced by the 2.2 mm clear corneal incision (0.68 ± 0.49 D). Conclusion. The 2.2 mm square posterior limbal incision induced significantly less, and significantly less variable, surgically induced astigmatism relative to a similar-sized clear corneal incision. This is likely to improve refractive outcomes, particularly important with regard to premium intraocular lenses.
PMCID: PMC3216393  PMID: 22132310
5.  Monte Carlo simulation of expected outcomes with the AcrySof® toric intraocular lens 
BMC Ophthalmology  2008;8:22.
To use a Monte Carlo simulation to predict postoperative results with the AcrySof® Toric lens, evaluating the likelihood of over- or under-correction using various toric lens selection criteria.
Keratometric data were obtained from a large patient population with preoperative corneal astigmatism <= 2.50D (2,000 eyes). The probability distributions for toric marking accuracy, surgically induced astigmatism and lens rotation were estimated using available data. Anticipated residual astigmatism was calculated using a Monte Carlo simulation under two different lens selection scenarios.
This simulation demonstrated that random errors in alignment, surgically induced astigmatism and lens rotation slightly reduced the overall effect of the toric lens. Residual astigmatism was statistically significantly higher under the simulation of surgery relative to an exact calculation (p < 0.05). The simulation also demonstrated that more aggressive lens selection criteria could produce clinically significant reductions in residual astigmatism in a high percentage of patients.
Monte Carlo simulation suggests that surgical variability and lens orientation/rotation variability may combine to produce small reductions in the correction achieved with the AcrySof® Toric® IOL. Adopting more aggressive lens selection criteria may yield significantly lower residual astigmatism values for many patients, with negligible overcorrections. Surgeons are encouraged to evaluate their AcrySof® Toric® outcomes to determine if they should modify their individual lens selection criteria, or their default surgically induced astigmatism value, to benefit their patients.
PMCID: PMC2586009  PMID: 18954445

Results 1-5 (5)