scholarly journals Effects of V4c-ICL Implantation on Myopic Patients’ Vision-Related Daily Activities

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Taixiang Liu ◽  
Shaorong Linghu ◽  
Le Pan ◽  
Rong Shi
Keyword(s):  
Visual Acuity ◽  
Daily Activities ◽  
Central Hole ◽  
Spherical Equivalent ◽  
Implantable Collamer Lens ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
New Type ◽  
Best Corrected Visual Acuity ◽  
Better Than

The new type implantable Collamer lens with a central hole (V4c-ICL) is widely used to treat myopia. However, halos occur in some patients after surgery. The aim is to evaluate the effect of V4c-ICL implantation on vision-related daily activities. This retrospective study included 42 patients. Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), intraocular pressure (IOP), endothelial cell density (ECD), and vault were recorded and vision-related daily activities were evaluated at 3 months after operation. The average spherical equivalent was-0.12±0.33 D at 3 months after operation. UCVA equal to or better than preoperative BCVA occurred in 98% of eyes. The average BCVA at 3 months after operation was-0.03±0.07LogMAR, which was significantly better than preoperative BCVA (0.08±0.10LogMAR) (P=0.029). Apart from one patient (2.4%) who had difficulty reading computer screens, all patients had satisfactory or very satisfactory results. During the early postoperation, halos occurred in 23 patients (54.8%). However there were no significant differences in the scores of visual functions between patients with and without halos (P>0.05). Patients were very satisfied with their vision-related daily activities at 3 months after operation. The central hole of V4c-ICL does not affect patients’ vision-related daily activities.

scholarly journals Corneal Neovascularization and Lipid Keratopathy after Intacs SK in Keratoconus

2013 ◽  
Vol 2 (3) ◽  
pp. 133-138
Author(s):  
Ramez Barbara ◽  
David Zadok ◽  
Adel Barbara ◽  
Shay Gutfreund
Keyword(s):  
Visual Acuity ◽  
Penetrating Keratoplasty ◽  
Corneal Neovascularization ◽  
Young Female ◽  
Spherical Equivalent ◽  
Corrected Visual Acuity ◽  
Optical Zone ◽  
Positive Results ◽  
Oval Shape ◽  
Best Corrected Visual Acuity

ABSTRACT Intacs have yielded positive results for the treatment of keratoconus in terms of reducing the keratometry readings astigmatism and spherical equivalent and consequently improving the uncorrected and best corrected visual acuity. Intacs severe keratoconus (SK) are new design of Intacs with a smaller optical zone (6 mm) and oval shape, they are indicated for severe keratocnus. Pannus is one of the complications of Intacs, as it has never been reported after Intacs SK. We report on corneal neovascularization in the corneal periphery which developed few months after Intacs SK implantation in the cornea of a young female who suffered from advanced keratoconus. The uncorrected visual (UCVA) acuity was satisfactory and the Intacs SK where not removed. Four years after the implantation she presented to our clinic complaining about eye irritation and photophobia, lipid keratopathy was observed. We gave here the choice of explanting the Intacs SK or to try to treat the neovascularization by subconjunctival Avastin, she preferred the second option because of a satisfactory UCVA (0.9). Avastin was injected in the subconjunctival, 10 weeks later Avastin and Kenelog were injected in the subconjunctival, few days after the second injection perforation and melting developed in the cornea, the patient underwent a tectonic graft and few months later penetrating keratoplasty with no intraoperative or postoperative complications. How to cite this article Barbara A, Zadok D, Gutfreund S, Barbara R. Corneal Neovascularization and Lipid Keratopathy after Intacs SK in Keratoconus. J Kerat Ect Cor Dis 2013;2(3):133-138.

scholarly journals Considerations of Visual Quality in Ocular Surgery as Presented at Dry Eye University

2020 ◽  
Vol 3 ((SP1)) ◽  
pp. e28-e29
Author(s):  
Frank Bowden
Keyword(s):  
Visual Acuity ◽  
Visual Experience ◽  
Visual Quality ◽  
Ocular Surgery ◽  
Optical Efficiency ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Visual Phenomena ◽  
Visual Disturbances ◽  
Best Corrected Visual Acuity

Visual quality may be described as the visual experience which reflects the optimal optical efficiency of the eye. Patients undergoing ocular surgery expect improvement in visual acuity. Ocular surgeons typically aim to improve best-corrected visual acuity. Refractive surgeons, on the other hand, strive to improve uncorrected visual acuity. It is not uncommon that patients with excellent corrected visual acuity following surgery may be dissatisfied with visual quality which is less than anticipated due to unexpected visual disturbances. These visual phenomena may include ghosting, glare, halos, reduced contrast sensitivity, and visual fluctuation.

scholarly journals Correction of postkeratoplastic astigmatism by intrastromal corneal segments implantation using a femtosecond laser

2021 ◽  
Vol 6 (6-1) ◽  
pp. 48-55
Author(s):  
N. A. Pozdeyeva ◽  
M. V. Sinitsyn ◽  
A. E. Terentieva ◽  
O. V. Shlenskaya
Keyword(s):  
Visual Acuity ◽  
Femtosecond Laser ◽  
Penetrating Keratoplasty ◽  
Biomechanical Properties ◽  
Corneal Graft ◽  
Corneal Resistance Factor ◽  
Astigmatism Correction ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Best Corrected Visual Acuity

Background. After penetrating keratoplasty, mild to high induced corneal astigmatism was observed in each case. The existing choice of correction of postkeratoplastic astigmatism is aimed at fi nding an individual approach in order to compensate for it and not weaken the biomechanical properties of the corneal graft.The aim: to analyze the clinical, functional, and morphological results of postkeratoplastic astigmatism correction by implantation of intrastromal corneal segments using a femtosecond laser.Methods. 22 patients were examined before and 1 year after surgery. The operation was performed under local anesthesia: stage I – an intrastromal tunnel was formed using a femtosecond laser “Femto Visum” 1 MHz (Optosystems, Russia); stage II – the intrastromal corneal segments were implanted. The results were assessed using standard and special research methods using optical coherence tomography Visante OCT (Zeiss, Germany), keratotopography (Tomey-5, Japan), optical corneal analyzer ORA (Reichert, USA), laser tindalemetry FC-2000 (Kowa, Japan) and confocal microscope Confoscan-4 (Nidek, Japan).Results. Before the operation, uncorrected visual acuity averaged 0.09 ± 0.05, after a year – 0.50 ± 0.16; best corrected visual acuity – 0.30 ± 0.12 and 0.60 ± 0.05 respectively; cylindrical component of refraction – –10.29 ± 3.12 and –2.20 ± 0.64 D respectively; mean keratometry value – 43.59 ± 2.14 and 38.56 ± 1.75 D respectively; corneal hysteresis – 7.92 ± 1.22 and 8.95 ± 1.05 mm Hg respectively; corneal resistance factor – 7.01 ± 1.81 and 8.44 ± 1.44 mm Hg respectively; protein fl ux in the moisture of the anterior chamber – 2.97 ± 0.28 and 3.04 ± 0.24 f/ms respectively; endothelial cell density – 1521 ± 327 and 1475 ± 419 cells/mm2 respectively.Conclusion. Intrastromal corneal segments implantation into a corneal graft using a femtosecond laser has efficiency and safety method in correcting postkeratoplastic astigmatism.

scholarly journals Standardized Flanged Intrascleral Intraocular Lens Fixation with the Double-Needle Technique for Cataract Luxation in the Vitreous Chamber during Phacoemulsification

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Gianluca Besozzi ◽  
Chiara Posarelli ◽  
Maria Carmela Costa ◽  
Alessio Montericcio ◽  
Giuseppe Nitti ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Endothelial Cell ◽  
Cell Count ◽  
Intraocular Lens ◽  
Spherical Equivalent ◽  
Refractive Outcome ◽  
Endothelial Cell Count ◽  
Corrected Visual Acuity ◽  
Target Refraction ◽  
Best Corrected Visual Acuity

Purpose. To assess the visual and refractive outcome of immediate intraoperative vitrectomy and intrascleral intraocular lens implantation using a “standardized” sutureless Yamane technique during cataract luxation in the vitreous chamber as a complication of phacoemulsification. Design. A prospective, interventional, consecutive case series. Materials and Methods. Twelve patients underwent vitrectomy and intrascleral intraocular lens fixation using a standardized Yamane technique as the primary procedure during complicated phacoemulsification. Patients were evaluated preoperatively and 6 months postoperatively for best-corrected distance visual acuity, correspondence to the preoperative refractive target in the spherical equivalent, endothelial cell count, and complications. Results. Mean preoperative best-corrected visual acuity was 1.16 ± 0.3 logarithm of the minimum angle of resolution (logMAR), the endothelial cell count was 1910.5 ± 297.64, and target refraction at baseline was −0.197 ± 0.087. Postoperatively, best-corrected visual acuity was significantly improved; the mean value was 0.05 logMAR ± 0.06. Mean baseline target refraction in the spherical equivalent was −0.20 ± −0.09 (range: −0.08 to −0.37), and mean final refraction was −0.44 ± −0.14 (range: −0.25 to −0.75) with no significant difference p = 0.87 . No complication was registered intra- and postoperatively. Conclusion. Standardization of the Yamane technique seemed a valuable option for patients who had complicated phacoemulsification to achieve a predictable refractive outcome. Synopsis. The predictable refractive outcome could be achieved with the immediate standardized Yamane technique in patients with intraoperative cataract luxation in the vitreous chamber during phacoemulsification.

Chronological changes of the anterior chamber structure, axial length, and refraction in patients with Vogt–Koyanagi–Harada disease

2020 ◽  
pp. 112067212090203
Author(s):  
Tetsuya Muto ◽  
Shigeki Machida
Keyword(s):  
Visual Acuity ◽  
Anterior Chamber ◽  
Axial Length ◽  
Anterior Chamber Depth ◽  
Pulse Treatment ◽  
Spherical Equivalent ◽  
Foveal Thickness ◽  
Steroid Pulse ◽  
Corrected Visual Acuity ◽  
Best Corrected Visual Acuity

Purpose: To clarify the chronological changes in the anterior chamber structure and identify the spherical equivalent and axial length to assess the effects of steroid pulse treatment in patients with Vogt–Koyanagi–Harada disease with active uveitis. Methods: The anterior chamber condition, including anterior chamber volume, central anterior chamber depth, peripheral anterior chamber depth, anterior chamber angle, and pupil diameter, was measured using Pentacam, and axial length was measured using IOLMaster in patients with Vogt–Koyanagi–Harada disease between June 2015 and February 2018. Furthermore, the best-corrected visual acuity, spherical equivalent, and retinal foveola thickness were also analyzed. All patients were treated with steroid pulse. All these factors were compared before and at 1 and 6 months of treatment. Results: Significant changes were observed in the anterior chamber volume, central anterior chamber depth, peripheral anterior chamber depth, anterior chamber angle, axial length, best-corrected visual acuity, spherical equivalent, and retinal foveal thickness before and at 1 and 6 months of steroid pulse treatment ( P < 0.001, P < 0.001, P < 0.001, P = 0.0015, P = 0.027, P < 0.001, P = 0.0043, and P < 0.001, respectively). No significant difference was observed in the pupil diameter before and at 1 month and 6 months of steroid pulse treatment ( P = 0.11). Conclusion: The anterior chamber structure, axial length, best-corrected visual acuity, spherical equivalent, and retinal foveal thickness were dramatically changed by steroid pulse treatment in patients with Vogt–Koyanagi–Harada disease who develop active uveitis. These changes were completed within 1 month.

scholarly journals Ferrara Intrastromal Corneal Ring Segments

2016 ◽  
Vol 5 (3) ◽  
pp. 114-127 ◽  
Author(s):  
Leonardo Torquetti ◽  
Jordana Sandes
Keyword(s):  
Visual Acuity ◽  
Clinical Experience ◽  
Contact Lens ◽  
Corrected Visual Acuity ◽  
Intrastromal Corneal Ring ◽  
Uncorrected Visual Acuity ◽  
Best Corrected Visual Acuity

ABSTRACT The Ferrara intrastromal corneal ring segments (ICRS) are designed to treat ectatic corneal disorders, especially keratoconus. They have been used to reshape keratoconic corneas to improve uncorrected visual acuity, best-corrected visual acuity, contact lens tolerance and to delay or prevent the need for keratoplasty. Intrastromal corneal ring segments have several distinct and important advantages. The Ferrara ICRS have been used largely in several countries for the treatment of primary and secondary ectatic corneal disorders. This article reviews the latest data published and the clinical experience/findings on the treatment of keratoconus by the Ferrara ICRS implantation. How to cite this article Torquetti L, Sandes J, Ferrara G, Ferrara P. Ferrara Intrastromal Corneal Ring Segments. Int J Kerat Ect Cor Dis 2016;5(3):114-127.

scholarly journals Transepithelial High Fluence Crosslinking for Keratoconus – Case Report of 1-year Follow-up

2015 ◽  
Vol 09 (01) ◽  
pp. 21
Author(s):  
Roberto Pinelli ◽  
Zahran Yazan Amin ◽  
◽  
Keyword(s):  
Visual Acuity ◽  
Case Report ◽  
Corneal Topography ◽  
High Fluence ◽  
Efficacy And Safety ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Best Corrected Visual Acuity

Purpose:To evaluate the efficacy and safety of transepithelial crosslinking for halting the progression of keratoconus.Methods:Uncorrected and corrected visual acuity, simulated keratometry, corneal topography and pachymetry data were evaluated at baseline and 1 year after bilateral transepithelial crosslinking using ParaCel™ and the KXL™ device (Avedro, Waltham, Massachusetts, US).Results:The keratometry, uncorrected visual acuity, best corrected visual acuity at the baseline and after 1 year of follow-up was stable and even improved with time.Conclusion:Transepithelial crosslinking can safely and effectively halt the progression of keratoconus as demonstrated by follow-up.

scholarly journals Near Visual Acuity Following Hyperopic Photorefractive Keratectomy in a Presbyopic Age Group

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Michael Moore ◽  
Antonio Leccisotti ◽  
Claire Grills ◽  
Tara C. B. Moore
Keyword(s):  
Visual Acuity ◽  
Photorefractive Keratectomy ◽  
Control Group ◽  
Age Group ◽  
Near Vision ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Near Visual Acuity ◽  
The Mean ◽  
Better Than

Purpose. To assess near visual acuity in a presbyopic age group following hyperopic photorefractive keratectomy (PRK). Setting. Private practice in Siena, Italy. Methods. In this retrospective single-surgeon comparative study, PRK with mitomycin C was performed to correct hyperopia using Bausch & Lomb 217z laser for 120 eyes of 60 patients in the presbyopic age group (mean spherical equivalent SE +2.38 D ± 0.71 D and mean age ). 120 eyes of 60 age-matched controls (mean age ) had their unaided near vision measured. Results. At 12 months mean SE was −0.10 D ± 0.27 D in the PRK group. Mean best corrected visual acuity (BSCVA) was log MAR; 2 eyes lost ≥0.1 log MAR. Mean uncorrected visual acuity was log MAR. Mean distance corrected near visual acuity (DCNVA) in the PRK group was . This was statistically better () than the mean unaided near visual acuity in the control group . Conclusion. PRK was found to be safe, predictable, and an effective way of correcting hyperopia in this age group. It was also found to give better than expected near vision.

scholarly journals Treatment of Stable Keratoconus by Cataract Surgery with Toric IOL Implantation

2012 ◽  
Vol 1 (2) ◽  
pp. 128-130
Author(s):  
Tova Lifshitz ◽  
Jaime Levy ◽  
Anry Pitchkhadze
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Intraocular Lens ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Cylinder Power ◽  
Best Corrected Visual Acuity

ABSTRACT We present the case of a 73-year-old patient who underwent successful phacoemulsification and toric intraocular lens (IOL) implantation to correct high stable astigmatism due to keratoconus and cataract. Preoperative refraction was −3.25 −4.0 × 98°. A toric IOL (Acrysof SN60T6) with a spherical power of 16.5 D and a cylinder power of 3.75 D at the IOL plane and 2.57 D at the corneal plane was implanted and aligned at an axis of 0°. Uncorrected visual acuity improved from 6/60 to 6/10. Postoperative best corrected visual acuity was 6/6, 6 months after the operation. In conclusion, phacoemulsification with toric IOL implantation can be performed in eyes with keratoconus and cataract. How to cite this article Levy J, Pitchkhadze A, Lifshitz T. Treatment of Stable Keratoconus by Cataract Surgery with Toric IOL Implantation. Int J Kerat Ect Cor Dis 2012;1(2):128-130.

scholarly journals Near and Distance Stereoacuity in Hyperopic Anisometropic Amblyopia Patients Treated after 6 Years of Age

2020 ◽  
Author(s):  
Rijo Hayashi ◽  
Shimmin Hayashi ◽  
Shigeki Machida
Keyword(s):  
Visual Acuity ◽  
Late Childhood ◽  
Treatment Results ◽  
Anisometropic Amblyopia ◽  
Good Visual Acuity ◽  
Corrected Visual Acuity ◽  
Treatment Onset ◽  
Worse Prognosis ◽  
Best Corrected Visual Acuity ◽  
Better Than

Abstract Background Hyperopic anisometropic amblyopia is considered to have worse prognosis in stereoacuity especially when the treatment is begun at late childhood. The present study investigated both near and distance stereoacuity in hyperopic anisometropic amblyopia patients who began treatment after 6 years of age and had good visual acuity in the amblyopic eye. Methods Ten hyperopic anisometropic amblyopia patients who began their treatment after 6 years of age and improved the visual acuity of their amblyopic eye to over 0.9 were included. The age at which a patient started wearing spectacles corresponded to the age of treatment onset, whereas the number of months required to reach the best corrected visual acuity was considered as the period of treatment. Near and distance stereoacuity were measured. We performed correlational analyses between stereoacuity scores and several other variables, such as the age at which stereoacuity was measured, the binocular refractions differences, the age of treatment onset, and the period of treatment. Results The age of treatment onset ranged from 6 to 8 years. With the exception of two patients, all subjects obtained near stereoacuity better than 100 sec and distance stereoacuity better than 120 sec following treatment. Stereoacuity scores did not significantly correlate with the age of treatment onset or with the binocular refraction differences. Stereoacuity scores (both near and distance) significantly positively correlated with the period of treatment. Conclusion The stereoacuity of our patients reached normal levels following treatment. These findings suggested that anisometropic amblyopia should be treated aggressively even in patients older than 6 years of age.

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