pdf version - Wang Vision Institute
... astigmatism (Table 3). In our study, the index of success was 0.24 in the low-ORA group and 0.50 in the high-ORA group. Our study is unique in that it differentiates the efficacy of astigmatic correction based on the location of the astigmatism on the visual axis and derives an index of success for ...
... astigmatism (Table 3). In our study, the index of success was 0.24 in the low-ORA group and 0.50 in the high-ORA group. Our study is unique in that it differentiates the efficacy of astigmatic correction based on the location of the astigmatism on the visual axis and derives an index of success for ...
Scleral fixation of dislocated posterior chamber intraocular lenses
... IOL repositioning. The Snellen BCVA at the last postoperative visit was 20/40 or better in 10 eyes, 20/50 to 20/200 in 2 eyes, and worse than 20/200 in 2 patients. The patients with a BCVA worse than 20/200 had a median refractive error of ⫺2.00 D (range plano to ⫺5.00 D). All IOLs were stably fixat ...
... IOL repositioning. The Snellen BCVA at the last postoperative visit was 20/40 or better in 10 eyes, 20/50 to 20/200 in 2 eyes, and worse than 20/200 in 2 patients. The patients with a BCVA worse than 20/200 had a median refractive error of ⫺2.00 D (range plano to ⫺5.00 D). All IOLs were stably fixat ...
PDF Edition - Review of Optometry
... Microbial keratitis is the most visually devastating complication associated with contact lens wear. While even daily wear of contact lenses carries an increased risk for infection, extended or overnight contact lens wear is the greatest risk factor for infectious keratitis in patients choosing to w ...
... Microbial keratitis is the most visually devastating complication associated with contact lens wear. While even daily wear of contact lenses carries an increased risk for infection, extended or overnight contact lens wear is the greatest risk factor for infectious keratitis in patients choosing to w ...
Severe N.PM
... that such emmetropization can be prevented by giving corrective lenses to the animals.13 This evidence supports the hypothesis that the quality of the visual image is important in guiding the coordinated growth and refractive development of the eye. The underlying mechanism that controls this intere ...
... that such emmetropization can be prevented by giving corrective lenses to the animals.13 This evidence supports the hypothesis that the quality of the visual image is important in guiding the coordinated growth and refractive development of the eye. The underlying mechanism that controls this intere ...
Disconjugate adaptation to long-standing, large-amplitude
... Disconjugate Adaptation to Long-Standing, LargeAmplitude, Spectacle-Corrected Anisometropia Akihiko Oohira,*j- Dovid 5. Zee,*f and David L. Guyron* A 12-yr-old anisometropic patient had worn corrective eyeglasses (right eye, -0.50 +1.50 X 125; LE, -9.75 +2.50 X 60) for 7 yr, and then changed to cont ...
... Disconjugate Adaptation to Long-Standing, LargeAmplitude, Spectacle-Corrected Anisometropia Akihiko Oohira,*j- Dovid 5. Zee,*f and David L. Guyron* A 12-yr-old anisometropic patient had worn corrective eyeglasses (right eye, -0.50 +1.50 X 125; LE, -9.75 +2.50 X 60) for 7 yr, and then changed to cont ...
A Brief History of the Ophthalmoscope
... his Augenspiegel in 1851. He had calculated that his line of vision had to be on the same axis as the direction of the illumination. His solution to this problem was to use laboratory cover plates placed one on top of the other and positioned at an angle such that the light was reflected into the pa ...
... his Augenspiegel in 1851. He had calculated that his line of vision had to be on the same axis as the direction of the illumination. His solution to this problem was to use laboratory cover plates placed one on top of the other and positioned at an angle such that the light was reflected into the pa ...
dislocated Posterior chamber intraocular Lens Management
... Step No. 2: Sclerotomies for polypropylene suture, securing the IOL. The 23-gauge trocar blades are used to make the sclerotomies (Figure 2). These 23-gauge sclerotomies are self-sealing yet large enough to allow rotation of the knot into the globe once the polypropylene suture is tied. The 2 sets o ...
... Step No. 2: Sclerotomies for polypropylene suture, securing the IOL. The 23-gauge trocar blades are used to make the sclerotomies (Figure 2). These 23-gauge sclerotomies are self-sealing yet large enough to allow rotation of the knot into the globe once the polypropylene suture is tied. The 2 sets o ...
Multifocal intraocular lenses: Relative indications and
... spherical aberration, or first-order astigmatism, is increased from a zero value, a proportionate decrease in contrast follows. It is well known that the visual quality of a diffractive optics multifocal IOL is best when the spherical equivalent (SE) is close to plano and postoperative regular corne ...
... spherical aberration, or first-order astigmatism, is increased from a zero value, a proportionate decrease in contrast follows. It is well known that the visual quality of a diffractive optics multifocal IOL is best when the spherical equivalent (SE) is close to plano and postoperative regular corne ...
History of Optometry - Indiana University School of Optometry
... Original stimuli for optometry to move into the area of ocular disease: a. interest of some optometrists b. Optometrists were distributed more evenly across the country and were the only eye/vision practitioner in many rural areas and small towns. Optometrists had to refer eye disease to either the ...
... Original stimuli for optometry to move into the area of ocular disease: a. interest of some optometrists b. Optometrists were distributed more evenly across the country and were the only eye/vision practitioner in many rural areas and small towns. Optometrists had to refer eye disease to either the ...
Chapter 7 - The EMMES Corporation
... A manifest refraction and visual acuity measurement according to the detailed study protocol must be performed during (a) the Qualifying Visit when the visual acuity score using Chart R is 73 letters or less in at least one eye, (b) the Randomization Visit, (c) Annual Visits, and (d) any Nonannual V ...
... A manifest refraction and visual acuity measurement according to the detailed study protocol must be performed during (a) the Qualifying Visit when the visual acuity score using Chart R is 73 letters or less in at least one eye, (b) the Randomization Visit, (c) Annual Visits, and (d) any Nonannual V ...
Keratoconus Problem? … NO PROBLEM!
... Differentiating between the three forms can be helpful in counseling patients about what to expect regarding eventual progression of the disease. However, the clinical classification of keratoconus should be viewed as only a general guide. It is important to communicate to the patient that the condi ...
... Differentiating between the three forms can be helpful in counseling patients about what to expect regarding eventual progression of the disease. However, the clinical classification of keratoconus should be viewed as only a general guide. It is important to communicate to the patient that the condi ...
Correlation Between Corneal and Total Wavefront
... C8. The correlation coefficients were found to be R=0.59 and R=0.67 for the vertical coma C7 and horizontal coma C8, respectively. For both coefficients, the correlations between corneal 3rd order coma and the 3rd order coma of the total wavefront were statistically significant (P<.001). In contrast ...
... C8. The correlation coefficients were found to be R=0.59 and R=0.67 for the vertical coma C7 and horizontal coma C8, respectively. For both coefficients, the correlations between corneal 3rd order coma and the 3rd order coma of the total wavefront were statistically significant (P<.001). In contrast ...
Presentación de PowerPoint
... Symptoms and signs Methods of measurement Prescription criteria Resolution of clinical cases ...
... Symptoms and signs Methods of measurement Prescription criteria Resolution of clinical cases ...
New supplementary intraocular lens for refractive enhancement in
... support caused the secondary IOL to decenter, which did not negatively affect the patient’s vision. We also believe that the posterior concave design of the secondary IOL prevented contact between and distortion of the optical zones. Implanting a secondary IOL with thick haptics and square-edged hap ...
... support caused the secondary IOL to decenter, which did not negatively affect the patient’s vision. We also believe that the posterior concave design of the secondary IOL prevented contact between and distortion of the optical zones. Implanting a secondary IOL with thick haptics and square-edged hap ...
Corneal Topography/Computer-Assisted Corneal Topography
... disease. Various techniques and instruments are available to measure corneal topography: keratometer, keratoscope, and computer-assisted photokeratoscopy. The keratometer (also referred to as an ophthalmometer), the most commonly used instrument, projects an illuminated image onto a central area in ...
... disease. Various techniques and instruments are available to measure corneal topography: keratometer, keratoscope, and computer-assisted photokeratoscopy. The keratometer (also referred to as an ophthalmometer), the most commonly used instrument, projects an illuminated image onto a central area in ...
Double-C loop platform in combination with hydrophobic and
... LABORATORY SCIENCE: DOUBLE-C-LOOP COMBINED WITH HYDROPHOBIC AND HYDROPHILIC ACRYLIC IOLS ...
... LABORATORY SCIENCE: DOUBLE-C-LOOP COMBINED WITH HYDROPHOBIC AND HYDROPHILIC ACRYLIC IOLS ...
Intrastromal corneal ring segments and posterior chamber phakic
... 6 months after pIOL implantation with corneal relaxing incisions (Figure 2). By 6 months after ICRS implantation, 4 eyes had lost 1 line of monocular CDVA, 9 eyes had no change, 9 eyes gained 1 line, 9 eyes gained 2 lines, and 8 eyes gained more than 2 lines. The safety index (ratio of postoperative ...
... 6 months after pIOL implantation with corneal relaxing incisions (Figure 2). By 6 months after ICRS implantation, 4 eyes had lost 1 line of monocular CDVA, 9 eyes had no change, 9 eyes gained 1 line, 9 eyes gained 2 lines, and 8 eyes gained more than 2 lines. The safety index (ratio of postoperative ...
Hyperopia - Diamond Vision
... • Young patients may or may not require glasses or contact lenses, depending on their ability to compensate for their farsightedness with accommodation. • Glasses or contact lenses are required for older patients. • Refractive surgery is an option for adults who wish to see clearly without glasses. ...
... • Young patients may or may not require glasses or contact lenses, depending on their ability to compensate for their farsightedness with accommodation. • Glasses or contact lenses are required for older patients. • Refractive surgery is an option for adults who wish to see clearly without glasses. ...
Clinical evaluation of the Crystalens AT
... optic and flexible hinged-plate haptics that allow forward movement of the optic during accommodative effort to provide near and intermediate vision in pseudophakic patients. The lens design incorporates grooves, or hinges, across the plates adjacent to the lens optic that allow for forward and back ...
... optic and flexible hinged-plate haptics that allow forward movement of the optic during accommodative effort to provide near and intermediate vision in pseudophakic patients. The lens design incorporates grooves, or hinges, across the plates adjacent to the lens optic that allow for forward and back ...
The choice of IOL for implantation in children
... implantation of silicone IOLs. To smaller extent this problem concerns all hydrophobic IOLs. Studies of McLoone [12] and Apple [13] have shown that IOL coating by silicone oil was 100% for silicone, 20% for PMMA, 17% to 33% for acrylic hydrophobic, and 5% for acrylic hydrophilic IOLs. Removal of hyd ...
... implantation of silicone IOLs. To smaller extent this problem concerns all hydrophobic IOLs. Studies of McLoone [12] and Apple [13] have shown that IOL coating by silicone oil was 100% for silicone, 20% for PMMA, 17% to 33% for acrylic hydrophobic, and 5% for acrylic hydrophilic IOLs. Removal of hyd ...
An Incremental Retinal-Defocus Theory of the Development of Myopia
... axial growth relative to normal. Thus, during an increment of genetically programmed ocular growth, a change in retinal-defocus magnitude due to the incremental change in ocular geometry provides sufficient directional information to modulate the rates of release of neuromodulators and proteoglycan ...
... axial growth relative to normal. Thus, during an increment of genetically programmed ocular growth, a change in retinal-defocus magnitude due to the incremental change in ocular geometry provides sufficient directional information to modulate the rates of release of neuromodulators and proteoglycan ...
Opposite Effects of Glucagon and Insulin on Compensation for
... One implication of this visual modulation of eye growth is that clinical myopia may not be a disease, but a consequence of a malfunctioning of the homeostatic control of eye growth by vision. Because the eye compensates by growing in opposite directions when an image is defocused by being in front o ...
... One implication of this visual modulation of eye growth is that clinical myopia may not be a disease, but a consequence of a malfunctioning of the homeostatic control of eye growth by vision. Because the eye compensates by growing in opposite directions when an image is defocused by being in front o ...
Corneal Desiccation in Rigid Gas Permeable Contact Lens Wear
... method that is able to correct the irregular cornea. Mild forms of corneal irregularities can usually be corrected with standard rigid gas permeable lenses. For more irregular corneal surfaces such as in keratoconus, post corneal grafts, high astigmatism and post-refractive surgery, specially design ...
... method that is able to correct the irregular cornea. Mild forms of corneal irregularities can usually be corrected with standard rigid gas permeable lenses. For more irregular corneal surfaces such as in keratoconus, post corneal grafts, high astigmatism and post-refractive surgery, specially design ...
The Appearance of Hyper-Reflective Superficial Epithelial Cells
... data that was used in this thesis. I would also say a warm thank you to all the people at the Centre for Contact Lens Research. I feel very fortunate in having to get to know all of you and not to forget to having been able to learn from your experience. You all have made my stay here in Waterloo en ...
... data that was used in this thesis. I would also say a warm thank you to all the people at the Centre for Contact Lens Research. I feel very fortunate in having to get to know all of you and not to forget to having been able to learn from your experience. You all have made my stay here in Waterloo en ...
Pediatric Cataract Management - All India Ophthalmological Society
... the parents. Strabismus may be the initial manifestation, especially in unilateral cases, and nystagmus or poor visual fixation may herald the presence of bilateral lens opacities in infancy. A history from the parents is useful to understand whether the cataract is congenital, developmental or trau ...
... the parents. Strabismus may be the initial manifestation, especially in unilateral cases, and nystagmus or poor visual fixation may herald the presence of bilateral lens opacities in infancy. A history from the parents is useful to understand whether the cataract is congenital, developmental or trau ...
Corrective lens
A corrective lens is a lens worn in front of the eye, mainly used to treat myopia, hyperopia, astigmatism, and presbyopia. Glasses or ""spectacles"" are worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye. Intraocular lenses are surgically implanted most commonly after cataract removal, but recently for purely refractive purposes. Myopia (near-sightedness) requires a divergent lens, whereas hyperopia (far-sightedness) requires convergent lens.