scholarly journals The Effect of Ptosis on Cataract Surgical Planning

2015 ◽  
Vol 6 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Irene C. Kuo
Keyword(s):  
Cataract Surgery ◽  
Surgical Planning ◽  
Cataract Extraction ◽  
Corneal Astigmatism ◽  
Upper Eyelid ◽  
Quality Of Vision ◽  
Wavefront Aberrometry ◽  
One Year ◽  
The Right

Purpose: To describe a patient complaining of ‘ghosting' and ‘shadowing' after bilateral, sequential cataract extraction with toric intraocular lens (IOL) implantation who was found to have significant eyelid ptosis. Methods: The following is a case report. Results: The patient's complaints arose a few weeks after surgery. By the second postoperative month, the patient's keratometry had changed compared to preoperative measurements. Because of significant ptosis, the patient underwent upper eyelid surgery. Four months later, he was found to have less corneal astigmatism than had been measured prior to cataract surgery. Following 2 stable examinations, a Prevue lens based on Hartmann-Shack wavefront aberrometry was made for each eye, which the patient said significantly improved his quality of vision. Wavefront-guided photorefractive keratectomy (PRK) was performed 6 months after cataract surgery. One year after PRK, the patient's symptoms had disappeared, his uncorrected visual acuity was 20/20 in the right eye and 20/15 in the left, and he was satisfied with his quality of vision. Conclusions: Bilateral toric IOLs were implanted in this patient based on measurements of corneal astigmatism that changed after cataract surgery and changed further after ptosis repair. This case demonstrates the importance of evaluating eyelid position in cataract surgical planning as ptosis can contribute significantly to corneal astigmatism. Patient education is important in the setting of higher expectations from purchase of premium lens implants.

scholarly journals Objective and subjective evaluation of trifocal diffractive intraocular Lens after cataract extraction with phacoemulsification: a prospective clinical study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ahmed A. Zein El-Dein ◽  
Ahmed Elmassry ◽  
Hazem M. El-Hennawi ◽  
Ehab F. Mossallam
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Subjective Evaluation ◽  
Cataract Extraction ◽  
Prospective Clinical Study ◽  
Gradual Change ◽  
Quality Of Vision ◽  
Defocus Curve

Abstract Background This study aimed to assess visual outcomes, quality of vision and patients’ satisfaction of a trifocal diffractive intraocular lens after cataract surgery with phacoemulsification. Results The study included 36 eyes that underwent implantation of trifocal diffractive intraocular lens (IOL). The residual mean postoperative spherical equivalent was − 0.40 ± 0.29 diopters. Mean Uncorrected distance visual acuity was 0.80 ± 0.16 decimal (snellen equivalent 25 ft) while mean Uncorrected intermediate visual acuity was 0.82 ± 0.31 decimal (snellen equivalent 25 ft) and mean Uncorrected near visual acuity (UCNVA) was 0.87 ± 0.20 decimal (snellen equivalent 23 ft). In defocus curve, there was infinitesimal gradual change between the three foci. Contrast sensitivity was just below the inferior limit of normal. Conclusion Trifocal diffractive IOL created a true intermediate focus proved by VA and defocus curve and better quality of vision assessed by contrast sensitivity and high order aberration. Moreover, it was safe and effective for correcting distance and near vision in these patients. Most of the patients were very satisfied and achieved spectacle independence. Trial registration Registration number and date: NCT04465279 on July 10, 2020.

Quality of vision after cataract surgery after Tecnis Z9000 intraocular lens implantation

2007 ◽  
Vol 33 (2) ◽  
pp. 210-216 ◽  
Author(s):  
Alexandre Denoyer ◽  
Marie-Laure Le Lez ◽  
Samuel Majzoub ◽  
Pierre-Jean Pisella
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Intraocular Lens Implantation ◽  
Quality Of Vision ◽  
Lens Implantation

scholarly journals Impact of cataracts and cataract surgery on quality of vision

2015 ◽  
Vol 133 (6) ◽  
pp. 538-539 ◽  
Author(s):  
Eirini Skiadaresi ◽  
Colm McAlinden
Keyword(s):  
Cataract Surgery ◽  
Quality Of Vision

scholarly journals Measurement of straylight for glare assessment and driving.

2017 ◽  
Vol 10 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Thomas JTP Van den Berg
Keyword(s):  
Cataract Surgery ◽  
Safety Issue ◽  
Large Degree ◽  
Limit Values ◽  
The Road ◽  
Quality Of Vision ◽  
Basic Quality ◽  
Commercial Instrument ◽  
Driver Licensing

In this review an overview of straylight as method to assess glare sensitivity for driver licensing will be given. Glare is an important safety issue while driving. It is well known that people stop driving at night because of glare when early cataract develops. It has been found to derive from the physical process of light scattering in the eye, causing a veil of straylight over the road scene. This veil lessens visibility, potentially up till complete blinding. By international agreement, glare is to be quantified by straylight based on the “equivalent luminance” concept. Normal standards have been defined, including age and cataract dependence. Straylight can be measured accurately with the psychophysical 2AFC “compensation comparison” method, including a reliability check. A commercial instrument called C-Quant is marketed.  As straylight is a basic quality of the eye, also other aspects of quality of vision, such as face recognition, contrast sensitivity, etc. depend on it. Straylight is used in ophthalmology as early indication for cataract surgery. It is to a large degree independent from acuity. Practical aspects of straylight measurement and limit values for occupational testing will be discussed. Normal young values are around log(s)=0.9. For demanding professions a limit elevation of 2x (0.3 log, corresponding to 3 standard deviations) is proposed. For normal driving a limit elevation of 4x is proposed, corresponding to log(s)=1.5. Cataract surgery is indicated at log(s)=1.4.

scholarly journals Subjective Quality of Vision Before and After Cataract Surgery

2012 ◽  
Vol 130 (11) ◽  
pp. 1377 ◽  
Author(s):  
Eirini Skiadaresi ◽  
Colm McAlinden ◽  
Konrad Pesudovs ◽  
Silvio Polizzi ◽  
Jyoti Khadka ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Subjective Quality ◽  
Quality Of Vision ◽  
Before And After

scholarly journals About the Possible Mechanisms of the Influence of Optical Intraocular Implants on the Characteristics of Neurosensory Rehabilitation and Adaptation in Patients with Pseudophakia. Literature Review

2021 ◽  
Vol 18 (1) ◽  
pp. 30-35
Author(s):  
L. Sh. Ramazanova ◽  
O. A. Napylova ◽  
R. Z. Shamratov
Keyword(s):  
Literature Review ◽  
Cataract Surgery ◽  
Intraocular Lenses ◽  
Scientific Publications ◽  
Visual Rehabilitation ◽  
Wavefront Aberrations ◽  
Target Indicator ◽  
Quality Of Life Indicators ◽  
Quality Of Vision

This literature review analyzed the possible mechanisms of the influence of the design features and optical characteristics of monofocal intraocular lenses (IOLs) on the characteristics of sensorineural adaptation and visual rehabilitation in patients after cataract phacoemulsification. Bibliographic research of scientific publications was carried out in the following databases: Medline, Pubmed, Cochrane, eLibrary. Languages of publications: Russian and English. The literature review reflects research data on the physicochemical properties, optical surface and color of the IOL filter, spatial contrast sensitivity and wavefront aberrations. Analysis of domestic and foreign literature has demonstrated the absence of a systematic approach to the study of sensorineural adaptation in patients after implantation of monofocal IOLs, which would make it possible to reasonably develop requirements for qualitative and constructive characteristics in the production of intraocular lenses to improve the quantitative and qualitative indicators of their visual functions in order to reduce the terms of rehabilitation and improvement of quality of life indicators in patients with pseudophakia. At the same time, there is an obvious need for research on the influence of the design and quality characteristics of optical intraocular implants on the subjective “quality of vision” of patients with pseudophakia, which is, ultimately, the target indicator of cataract surgery at the present stage. Also, the key mechanisms of neurosensory rehabilitation and adaptation of patients who underwent cataract surgery need to be studied and clarified in order to develop recommendations for the production of intraocular implants.

Validation and Repeatability of Inferior minus Superior Value and its Cut-off Value in Anterior Sagittal Curvature Map Using Pentacam in Early Keratoconus

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Mohammed El Sharkawy Mohammed Yousef ◽  
Rania Serag Elkitkat ◽  
Maged Maher Salib Roshdy ◽  
Khaled Abdel Wahab Eltagoury
Keyword(s):  
Refractive Surgery ◽  
Poor Quality ◽  
University Hospitals ◽  
Cross Sectional ◽  
High Area ◽  
Quality Of Vision ◽  
Significant Difference ◽  
The Right ◽  
Is Value

Abstract Background : Keratoconus (KC) is a bilateral asymmetric localised inferior and central corneal thinning and ectasia. Usually, it causes high myopia and irregular astigmatism resulting in a poor quality of vision. One of the most important ways of avoiding iatrogenic ectasia in cornea during refractive surgery is to detect KC in its earliest stage using the Pentacam. An important asymmetry decentration index is the inferior minus superior (IS) value. Purpose : Detection of Inferior minus Superior (IS) value and its Cut-off Value Methods : This is a cross-sectional, case control study that included 92 right eyes of 92 subjects, who presented to the outpatient clinic of “Al Watany Eye Hospitals” seeking refractive surgery or routine medical consultations. Our study focused on the measurement of the IS-value in early KC (TKC grade 1 and FFKC) and normal eyes. The right eye of each candidate was scanned 5 times in the same setting using the Pentacam. The study adhered to the tenets of the Declaration of Helsinki, and an approval was obtained from the ethical committee of Ain Shams University Hospitals. Results : We detected remarkably high statistically significant difference between patients and controls regarding the IS-value (p < 0.001). The mean (±SD) of control and cases group was 0.3 ± 0.2 and 1.4 ± 0.6, respectively. The cut-off point of 0.69 with high area under the receiver operating characteristic (AUROC). Coefficient of variation median (95% CI) for cases and controls were 1.4% (0.9 to 3.1%) and 6.2% (3 to 9.4%), respectively. Conclusion : The IS-value has a high repeatability and AUROC for differentiating early KC from normal corneas. It can be regarded as an accurate parameter for early KC detection.

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