![- Ophthalmology](http://s1.studyres.com/store/data/007973898_1-0a1512f54130ba78612c018a1b75d306-300x300.png)
- Ophthalmology
... implanted in numerous patients. This A-IOL is biconvex, with flexible hinged-plate haptics that in principle allow a forward or backward movement of the IOL. Most studies of this IOL (or other A-IOLs) primarily report visual functional outcomes in patients who have received the lens (visual acuity in ...
... implanted in numerous patients. This A-IOL is biconvex, with flexible hinged-plate haptics that in principle allow a forward or backward movement of the IOL. Most studies of this IOL (or other A-IOLs) primarily report visual functional outcomes in patients who have received the lens (visual acuity in ...
rX FACTor - Spectrum
... and Vehicle Licensing Agency tender process for the contract for visual field testing, the UK’s Optical Confederation has reported on a seminar hosted earlier this year by motoring charity The RAC Foundation about the potential for self-assessment tools to be used by older drivers in order to determ ...
... and Vehicle Licensing Agency tender process for the contract for visual field testing, the UK’s Optical Confederation has reported on a seminar hosted earlier this year by motoring charity The RAC Foundation about the potential for self-assessment tools to be used by older drivers in order to determ ...
Glaucoma - Paul G. Hayter, OD
... Visual acuity: This eye chart test measures how well you see at various distances. Visual Field: This test measures your side (peripheral) vision. It helps your eye care professional find out if you have lost side vision, a sign of glaucoma. Pupil dilation: This examination provides your eye care p ...
... Visual acuity: This eye chart test measures how well you see at various distances. Visual Field: This test measures your side (peripheral) vision. It helps your eye care professional find out if you have lost side vision, a sign of glaucoma. Pupil dilation: This examination provides your eye care p ...
iLASIK procedure.
... prepare the cornea for treatment. The femtosecond laser creates a pattern of pulses of laser energy at a specific depth within the cornea. At this point, corneal tissue is separated by a process called photodisruption. The creation of the iLASIK flap with a femtosecond laser takes less than 20 secon ...
... prepare the cornea for treatment. The femtosecond laser creates a pattern of pulses of laser energy at a specific depth within the cornea. At this point, corneal tissue is separated by a process called photodisruption. The creation of the iLASIK flap with a femtosecond laser takes less than 20 secon ...
FLEB 2012 ANNUAL.indd - Florida Lions Eye Bank
... But both her career and lifestyle were threatened with the gradual loss of sight from Fuchs’ dystrophy, an uncommon degenerative disease of the corneal endothelium that affects patients most often in their fifties and sixties. Karin had faced eye problems throughout her life, including childhood trea ...
... But both her career and lifestyle were threatened with the gradual loss of sight from Fuchs’ dystrophy, an uncommon degenerative disease of the corneal endothelium that affects patients most often in their fifties and sixties. Karin had faced eye problems throughout her life, including childhood trea ...
Astigmatism – Definition, Etiology, Classification, Diagnosis
... refractive error (ametropia) that occurs when parallel rays of light entering the nonaccommoding eye are not focused on the retina [American Academy of Ophthalmology (AAO), 2007]. Astigmatism occurs when incident light rays do not converge at a single focal point. The cornea of the normal eye has a ...
... refractive error (ametropia) that occurs when parallel rays of light entering the nonaccommoding eye are not focused on the retina [American Academy of Ophthalmology (AAO), 2007]. Astigmatism occurs when incident light rays do not converge at a single focal point. The cornea of the normal eye has a ...
Heterogeneity of collagens in rabbit cornea: type VI collagen.
... Heterogeneity of Collagens in Rabbit Cornea: Type VI Collagen Charles Cinrron* and Bor-Shyue Hongf Normal adult rabbit corneas were digested with 5% pepsin and their collagens extracted with acetic acid. Collagen extracts were fractionated by differential salt precipitation. The 2.5 M NaCl fraction ...
... Heterogeneity of Collagens in Rabbit Cornea: Type VI Collagen Charles Cinrron* and Bor-Shyue Hongf Normal adult rabbit corneas were digested with 5% pepsin and their collagens extracted with acetic acid. Collagen extracts were fractionated by differential salt precipitation. The 2.5 M NaCl fraction ...
ICL Patient Information Booklet
... Collamer® with a design similar to existing intraocular lenses currently used to correct vision after cataract surgery. The Visian ICL is placed through a small incision in your eye, in front of your existing crystalline lens in your eye to improve your nearsightedness. The Visian ICL is designed fo ...
... Collamer® with a design similar to existing intraocular lenses currently used to correct vision after cataract surgery. The Visian ICL is placed through a small incision in your eye, in front of your existing crystalline lens in your eye to improve your nearsightedness. The Visian ICL is designed fo ...
PDF - touchOPHTHALMOLOGY
... DED, the principal type seen in moderate to severe cases.22 Diagnosis and management of DED has been a source of frustration to clinicians for a number of reasons; one of which is a lack of correlation between signs and symptoms. 11,23–25 While this is undoubtedly attributable, in part, to psycholog ...
... DED, the principal type seen in moderate to severe cases.22 Diagnosis and management of DED has been a source of frustration to clinicians for a number of reasons; one of which is a lack of correlation between signs and symptoms. 11,23–25 While this is undoubtedly attributable, in part, to psycholog ...
Optical Pearls and Pitfalls
... induced have been tabulated by Thompson and Guyton9 or may be calculated with a formula. Fortunately, additivity error is not significant when adding a vertical prism to a horizontal one. Thus, a vertical and a horizontal prism may be stacked together with no significant interaction between the two wh ...
... induced have been tabulated by Thompson and Guyton9 or may be calculated with a formula. Fortunately, additivity error is not significant when adding a vertical prism to a horizontal one. Thus, a vertical and a horizontal prism may be stacked together with no significant interaction between the two wh ...
to the PDF version of this publication
... modality for allergy sufferers. Preservatives from cleaning systems are also minimized reducing their toxic effects on ocular tissues. Any bacterial biofilms are disposed of every night and this, in theory should greatly reduce the risk of any microbial consequences of contact lens wear. Fahmy, et a ...
... modality for allergy sufferers. Preservatives from cleaning systems are also minimized reducing their toxic effects on ocular tissues. Any bacterial biofilms are disposed of every night and this, in theory should greatly reduce the risk of any microbial consequences of contact lens wear. Fahmy, et a ...
The ONIT Study���Ocular Nutrition Impact on Tear
... history were recorded. The following examination procedures were performed for both eyes at all visits. Slit-lamp examination included assessments of corneal edema, bulbar conjunctival injection, cornea staining, chemosis, inflammatory cell, and flare. The ocular surface was examined by assessing th ...
... history were recorded. The following examination procedures were performed for both eyes at all visits. Slit-lamp examination included assessments of corneal edema, bulbar conjunctival injection, cornea staining, chemosis, inflammatory cell, and flare. The ocular surface was examined by assessing th ...
strabismus
... • the onset of strabismus is most common in children at 18 months to 6 years old • if a parent notices their child’s eyes moving inward or outward, the eyes seem to be crossed, or the child is not focusing on objects, they should seek medical attention from: Children’s Hospital Boston ...
... • the onset of strabismus is most common in children at 18 months to 6 years old • if a parent notices their child’s eyes moving inward or outward, the eyes seem to be crossed, or the child is not focusing on objects, they should seek medical attention from: Children’s Hospital Boston ...
The ONIT Study–Ocular Nutrition Impact on Tear Film
... history were recorded. The following examination procedures were performed for both eyes at all visits. Slit-lamp examination included assessments of corneal edema, bulbar conjunctival injection, cornea staining, chemosis, inflammatory cell, and flare. The ocular surface was examined by assessing th ...
... history were recorded. The following examination procedures were performed for both eyes at all visits. Slit-lamp examination included assessments of corneal edema, bulbar conjunctival injection, cornea staining, chemosis, inflammatory cell, and flare. The ocular surface was examined by assessing th ...
Refractive surgery and the ADF
... The USN has been performing laser refractive surgery at Naval Medical Center San Diego since 1993 under the supervision of Captain Steve Schallhorn, Director of Cornea and Refractive Surgery (and also a former F-14 pilot and Top Gun instructor). To date the US Navy has performed over 10 000 PRK proc ...
... The USN has been performing laser refractive surgery at Naval Medical Center San Diego since 1993 under the supervision of Captain Steve Schallhorn, Director of Cornea and Refractive Surgery (and also a former F-14 pilot and Top Gun instructor). To date the US Navy has performed over 10 000 PRK proc ...
Vision Science II - Visual Optics Institute
... b. In general, the earlier the onset of myopia, the higher the final degree of myopia. c. For many individuals, myopic progression stops in late teenage years when axial growth normally stops. d. The annual rate of myopic progression in US children is typically about 0.25 D per year. e. Children of ...
... b. In general, the earlier the onset of myopia, the higher the final degree of myopia. c. For many individuals, myopic progression stops in late teenage years when axial growth normally stops. d. The annual rate of myopic progression in US children is typically about 0.25 D per year. e. Children of ...
OPHTHALMOL OG Y JOURNAL
... Science have doubled in size and expertise; affiliated physicians now offer diagnosis and treatment within all subspecialties of ophthalmology. An experienced multidisciplinary team provides the highest level of care, with an across-the-board track record of quality outcomes. Using highly advanced t ...
... Science have doubled in size and expertise; affiliated physicians now offer diagnosis and treatment within all subspecialties of ophthalmology. An experienced multidisciplinary team provides the highest level of care, with an across-the-board track record of quality outcomes. Using highly advanced t ...
In vivo confocal microscopy of the human cornea
... with confocal microscopy but comparisons of the in vivo (confocal microscopy) and ex vivo (light microscopy) aspects suggest that only the nucleus, or at best, the nucleus and a small portion of the cell body are visualised.17 Neither the keratocyte processes nor the stromal collagen fibres are visi ...
... with confocal microscopy but comparisons of the in vivo (confocal microscopy) and ex vivo (light microscopy) aspects suggest that only the nucleus, or at best, the nucleus and a small portion of the cell body are visualised.17 Neither the keratocyte processes nor the stromal collagen fibres are visi ...
Sources of error in intraocular lens power calculation
... curvature at 3.0 mm and the SD should be virtually the same for the apical radius. The assumed corneal anterior Q value is calculated for an individual 70 years of age using a relationship from Dubbelman et al.6 and indicates an almost spherical cornea (Q Z 0 defines a sphere), while the SD comes fr ...
... curvature at 3.0 mm and the SD should be virtually the same for the apical radius. The assumed corneal anterior Q value is calculated for an individual 70 years of age using a relationship from Dubbelman et al.6 and indicates an almost spherical cornea (Q Z 0 defines a sphere), while the SD comes fr ...
Effect of the polarization on ocular wave aberration measurements
... in the ray aberrations for some pupil locations with changes in the polarization of the illumination light. To emphasize these changes, we have calculated the differences between each polarization ray aberration and the natural light wave aberration for each pupil location and plotted them in Fig. 3 ...
... in the ray aberrations for some pupil locations with changes in the polarization of the illumination light. To emphasize these changes, we have calculated the differences between each polarization ray aberration and the natural light wave aberration for each pupil location and plotted them in Fig. 3 ...
Novel Formulation of Glycerin 1% Artificial Tears Extends Tear Film
... an important indication of artificial tear efficacy. Although there is no single ‘‘gold standard’’ test to evaluate the efficacy of treatment, there is evidence that TFBUT is more repeatable than other objective tests of dry eye disease.11 TFBUT can be determined using fluorescein break-up time (FBU ...
... an important indication of artificial tear efficacy. Although there is no single ‘‘gold standard’’ test to evaluate the efficacy of treatment, there is evidence that TFBUT is more repeatable than other objective tests of dry eye disease.11 TFBUT can be determined using fluorescein break-up time (FBU ...
An overview of contemporary refractive surgery
... stromal healing can be associated with haze and regression of refractive effect. In one of the prospective studies carried out by the author (1993-1995), when attempted versus achieved refractive correction was assessed six months after PRK treatment using a VISX 2020B laser, it was readily noted th ...
... stromal healing can be associated with haze and regression of refractive effect. In one of the prospective studies carried out by the author (1993-1995), when attempted versus achieved refractive correction was assessed six months after PRK treatment using a VISX 2020B laser, it was readily noted th ...
Review Article Femtosecond Laser-Assisted Cataract Surgery: A
... (CCI) to access the anterior chamber, although this method has been associated with an increased risk of postoperative endophthalmitis.14 A recent study utilized anterior segment OCT after cataract surgery to show that a majority of eyes had an internally gaping corneal wound and detachment of Desce ...
... (CCI) to access the anterior chamber, although this method has been associated with an increased risk of postoperative endophthalmitis.14 A recent study utilized anterior segment OCT after cataract surgery to show that a majority of eyes had an internally gaping corneal wound and detachment of Desce ...
Care of the Patient with Hyperopia
... There is no universal approach to the treatment of hyperopia. Specific elements of treatment should be tailored to individual patient needs. Table 2 (adapted from Figure 3 in the Guideline) provides an overview of the treatment and management of patients with hyperopia. Factors to be considered when ...
... There is no universal approach to the treatment of hyperopia. Specific elements of treatment should be tailored to individual patient needs. Table 2 (adapted from Figure 3 in the Guideline) provides an overview of the treatment and management of patients with hyperopia. Factors to be considered when ...
Keratoconus
![](https://commons.wikimedia.org/wiki/Special:FilePath/Keratoconus_eye.jpg?width=300)
Keratoconus (KC, KTCN) (from Greek: kerato- horn, cornea; and konos cone) is a degenerative disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than the more normal gradual curve.Keratoconus can cause substantial distortion of vision, with multiple images, streaking and sensitivity to light all often reported by the person. It is typically diagnosed in the person's adolescent years. If both eyes are significantly affected, the deterioration in vision can affect the person's ability to drive a car or read normal print.In most cases, corrective lenses fitted by a specialist are effective enough to allow the person to continue to drive legally and likewise function normally. Further progression of the disease may require surgery, for which several options are available, including intrastromal corneal ring segments, corneal collagen cross-linking, mini asymmetric radial keratotomy, corneal intrastromal implantation system (CISIS), topography-guided photorefractive keratectomy (PRK), topography-guided conductive keratoplasty, phakic intraocular lenses and, in 25% of cases, corneal transplantation.Estimates of the prevalence for keratoconus range from 1 in 500 to 1 in 2000 people, but difficulties with differential diagnosis cause uncertainty as to its prevalence. It seems to occur in populations throughout the world, although it is observed more frequently in certain ethnic groups, such as South Asians. Environmental and genetic factors are considered possible causes, but the exact cause is uncertain. It has been associated with detrimental enzyme activity within the cornea.