Intraocular lenses in age-related macular degeneration

Purpose: The aim of this work is to review the lenses, assessing their advantages and disadvantages. We describe a total of seven types of intraocular lenses (IOLs) recommended for age-related macular degeneration (AMD). Methods: We used the PubMed web platform to search for implantable devices in various stages of AMD. We searched for both prospective and retrospective studies and also case reports. Results: Clinical results in AMD patients have been described for a total of seven types of IOLs recommended for AMD: an implantable miniature telescope (IMT), IOL-VIP System, Lipshitz macular implant (LMI), sulcus-implanted Lipshitz macular implant, LMI-SI, Fresnel Prism Intraocular Lens, iolAMD and Scharioth Macula Lens. Conclusions: We conclude that to objectively ascertain the effectiveness and safety of these lenses, further independent clinical studies with longer follow-up data are necessary prior to the general use of these optical devices

Results of photorefractive keratectomy for myopia with the Technolas Keracor 116 excimer laser

2nd Aegean Cornea-Refractive Surgery Congress -- SEP 29-OCT 08, 1995 -- RHODES, GREECEWOS: A1996UA87100008PubMed ID: 8653501BACKGROUND: The refractive results of first consecutive 157 myopic eyes undergoing photorefractive keratectomy with the Technolas Keracor 116 excimer laser are presented with a B-month follow up. METHODS: Preoperative refractive errors (spherical equivalent) ranged between -1.75 diopters (D) and -20.00 D (mean: -7.19 +/- 3.73), A single ablation zone ranging from 4.5 mm to 6 mm was used. In all eyes except for those with myopia over -15 D, emmetropia was a goal, Postoperatively patients used fluoromethalone drops for 1 month. RESULTS: Treated eyes were divided into four groups based on preoperative myopia, Group 1 contained 15 eyes with myopia less than -3 D (93% were within +1 D postoperatively). In Group 2 there were 53 eyes with preoperative myopia between -3.25 D and -6.00 D (64.1% were within +/- 1 D postoperatively), Group 3 consisted of 53 eyes with preoperative myopia between -6.25 D and -10.00 D (41.5% were within +/- 1 D postoperatively). Group 4 contained 36 eyes with myopia over -10.00 D (13.8% were within +/- 1 D of attempted correction and 11.1% were within +/- 1 D postoperatively). CONCLUSIONS: Our study suggests that excimer laser photorefractive keratectomy using a 4.5 to 6.0 mm ablation zone effectively reduces myopia; however, predictability decreases as the attempted correction increases.Autonomous Technologies Corp, CIBA Vis Ophthal

Echographic findings in eyes with traumatic cataracts

PubMed ID: 3885750[No abstract available

Clinical results of implantation of the Medevec (R) mini-loop haptic anchor plate foldable lenses

WOS: 000083301500001PubMed ID: 10548456Purpose: To evaluate the surgical performance and postoperative outcomes of 50 consecutive implantations of the Medevec VS 2 UVTM mini-loop silicone plate lenses. Setting: Ege University Hospital, Eye Department, Izmir, Turkey. Methods: Forty-three patients of either sex, aged 49 years, or older, were included in the study. Clear corneal incision, circular curvilinear capsulorhexis, phacoemulsification and implantation of the Medevec VS 2 UVTM mini-loop silicone plate lenses using the injector-cartridge system was performed in all cases. The mean outcome measures were ease of implantation, intraoperative and postoperative complications, postoperative centration and visual acuity. Results: The mean follow-up was 10.2 months (range 8-11 months). Twenty-two lenses (44%) were easy to implant, 25 lenses (50%) required two or more manoeuvers. In 6 cases, the lens was implanted into a bag with torn anterior capsule and in 3 patients (6%), the lenses were implanted into the sulcus because of a torn posterior capsule during phacoemulsification. Best corrected visual acuity was greater than or equal to 7/10 in 48 eyes (96%) and greater than or equal to 10/10 in 42 eyes (84%) at 8 months. The examination of the lenses after 8 months showed no sign of haze, discoloration or tilt. Mean decentration of the lenses was 0.32 mm +/- 0.19 (SD). There were no cases of cystoid macular edema or retinal detachment. YAG capsulotomy was performed in one eye. Conclusions: Medevec VS 2 UVTM mini-loop silicone plate lenses appeared to have some learning curve for the implantation. They provided - even in the sulcus - excellent centration, good visual acuity and minimal postoperative complications

Medium-term results of implantable miniaturized telescopes in eyes with age-related macular degeneration

Symposium on Cataract, IOL and Refractive Surgery -- MAY, 2000 -- BOSTON, MASSACHUSETTSWOS: 000172079600016PubMed ID: 11709247Purpose: To evaluate the efficacy of an implantable miniaturized telescope, the IMT, in patients with age-related macular degeneration (ARMD). Setting. Ege University Faculty of Medicine, Ophthalmology Department, izmir, Turkey. Methods:Among 15 patients meeting the inclusion criteria for IMT implantation, 3 were willing to participate in this prospective clinical trial and had cataract extraction with IMT implantation. The effect of the IMT on visual outcome and daily activities was assessed over 18 months, Results. All patients had some improvement in distance and near vision. However, this did not lead to significant improvements in the ability to perform daily activities. One patient had 2 attacks of mild iritis that were controlled with topical medications. In another patient, bubbles that were noted inside the IMT soon after implantation were still present at 1 year. In this patient, the IMT was replaced with a conventional poly(methyl methacrylate) intraocular lens. Conclusions. Implantation of an IMT may positively affect the visual outcome and daily activities in some ARMD patients. However, proper patient selection and fully informed patient consent and understanding are mandatory. (C) 2001 ASCRS and ESCRS.IO

College Students’ Usage of and Preferences for Print and Electronic Textbooks

Although print textbooks have been central for schooling for more than two centuries, electronic textbooks (e-textbooks) are steadily growing in popu-larity among students at all levels of education. This sharp growth has esca-lated the need for further research to enable a better understanding of the changing patterns of students’ usage of print and electronic media. The study explores college students’ usage of and preference for print and elec-tronic textbooks in Bahrain Teachers’ College, in Bahrain. The sample of the study consisted of 271 undergraduate students selected from courses that utilized both formats of textbook as clearly indicated in their syllabi. De-scriptive analyses were used to analyze data collected. Results indicate that regardless of textbook format, the highest percentage of students use their textbooks only when their instructors require them to do so. For print text-books, results show that the highest percentage of students spend between 1 to 3 hours a week on reading. However, for e-textbooks, the highest per-centage of students spend only less than 1 hour per week on reading. An in-teresting finding for this study is that compared to print textbooks, e-textbooks gain a higher percentage of students’ usage when it comes to spending higher numbers of hours of reading per week. The study affirms that students are in general positive to the use of electronic format but still show a preference for print format as the best medium for academic study. Lastly, the study uncovers reasonable findings as to why students prefer one textbook format over the other