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Optometry and Vision Science: Official Publication of the American Academy of Optometry

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https://www.readbyqxmd.com/read/27922924/fixation-stability-recording-how-long-for-eyes-with-central-vision-loss
#1
Luminita Tarita-Nistor, Ishrat Gill, Esther G González, Martin J Steinbach
PURPOSE: Fixation examination with the MP-1 microperimeter (Nidek Technologies Srl., Vigonza, PD, Italy) determines the preferred retinal loci and fixation stability in patients with central vision loss. It is typically done for periods of 15 to 30 s as per the manual's recommendations, which are arbitrary. In this study, we examined (1) whether fixation stability depends on the duration of recording and (2) whether fixation stability changes over time. METHODS: Raw eye-position data from 76 patients with bilateral central vision loss (mean age = 80 ± 9...
December 5, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27918396/personalized-progressive-addition-lenses-correlation-between-performance-and-design
#2
Johanne Forkel, Jenny Lorén Reiniger, Adam Muschielok, Andrea Welk, Anne Seidemann, Peter Baumbach
PURPOSE: A continuous set of personalized designs (design space) for progressive addition lenses (PALs) is investigated. The main goals are (1) to study how the subjects' perception of a personalized design depends on its position in the design space and (2) to compare the performance of personalized PALs to a conventional PAL with a fixed design. METHODS: In a double-blind study, 51 subjects compared Rodenstock Impression FreeSign 3, which is a family of PALs with a continuously controllable personalized design, and Rodenstock Progressiv Life Free, which is a conventional PAL with a single fixed design...
December 1, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27906862/correlational-study-of-diabetic-retinopathy-and-hearing-loss
#3
Caroline Ooley, Weon Jun, Kim Le, Allen Kim, Nathan Rock, Molly Cardenal, Rebecca Kline, Drew Aldrich, John Hayes
PURPOSE: Our research goal was to complete a retrospective chart review to determine if there is a correlation between the level of diabetic retinopathy and diabetic neurosensory hearing loss. METHODS: A retrospective analysis of 175 Department of Veterans Affairs Computerized Patient Record System charts was completed at the VA Portland Health Care System. Subjects were classified by degree of diabetic retinopathy as follows: no diabetic retinopathy (n = 80), mild nonproliferative diabetic retinopathy (n = 51), moderate nonproliferative diabetic retinopathy (n = 25), and combined severe nonproliferative diabetic retinopathy and proliferative diabetic retinopathy (PDR) (n = 17)...
November 30, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27879499/impact-of-spherical-aberration-terms-on-multifocal-contact-lens-performance
#4
Cathleen Fedtke, Jennifer Sha, Varghese Thomas, Klaus Ehrmann, Ravi C Bakaraju
PURPOSE: To investigate the impact of the primary (PSA) and secondary (SSA) spherical aberration terms on visual performance (VP) in presbyopes, as measured using multifocal (MFCL) soft contact lenses on eye. METHODS: Seventeen presbyopes (age: 55.1 ± 6.9 years) wore seven commercial lenses (four center-near (MFCL N), one center-distance (MFCL D), one bifocal, and one single vision control). Unaided and with each lens on eye, the PSA and SSA terms were obtained with an aberrometer, the BHVI-EyeMapper (low illumination, natural and 4 mm pupil diameter)...
November 22, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27870779/painless-acanthamoeba-keratitis-with-normal-vision
#5
Pui Wai Rachel Kwok, Ka Wai Kam, Vishal Jhanji, Alvin L Young
PURPOSE: To report an atypical case of contact lens-related Acanthamoeba keratitis. CASE REPORT: A 15-year-old secondary school female student with a history of soft contact lens wear was referred to our hospital by a private general practitioner for management of right eye redness and discomfort for 2 weeks. Upon examination, the best-corrected visual acuity was 20/20 and 20/16 for her right and left eyes, respectively. There was diffuse radial keratoneuritis noted in the cornea of her right eye without any associated epithelial defect...
November 19, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27870778/inter-visit-test-retest-variability-of-oct-in-glaucoma
#6
John Graham Pearce, Ted Maddess
PURPOSE: To determine the inter-visit test-retest variability (TRV) of a spectral domain optical coherence tomograph, the Topcon 3D OCT-2000, in the measurement of optic nerve head topography, peripapillary retinal nerve fiber layer (pRNFL), and macular ganglion cell complex (GCC) parameters in glaucoma patients. We also examine whether TRV with this instrument varies with the extent of glaucomatous damage. METHODS: Twenty-four subjects with varying degrees of glaucoma severity provided 41 eyes with usable results for the study...
November 19, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27870777/minocycline-induced-scleral-and-dermal-hyperpigmentation
#7
Cheryl Haskes, Michael Shea, David Imondi
PURPOSE: To present a case of minocycline-induced blue scleral pigmentation and discuss the pathophysiology and differential diagnoses. The uses, mechanisms, and other adverse effects of minocycline will also be highlighted. CASE REPORT: An elderly Caucasian male patient presented for routine ocular examination complaining of blue discoloration to the whites of his eyes. He was found to have bilateral blue scleral pigmentation and blue discoloration to various other dermal areas of his body...
November 18, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27846063/comparison-of-cysts-in-red-and-green-images-for-diabetic-macular-edema
#8
Mastour A Alhamami, Ann E Elsner, Victor E Malinovsky, Christopher A Clark, Bryan P Haggerty, Glen Y Ozawa, Jorge A Cuadros, Karthikeyan Baskaran, Thomas J Gast, Taras V Litvin, Matthew S Muller, Shane G Brahm, Stuart B Young, Masahiro Miura
PURPOSE: To investigate whether cysts in diabetic macular edema are better visualized in the red channel of color fundus camera images, as compared with the green channel, because color fundus camera screening methods that emphasize short-wavelength light may miss cysts in patients with dark fundi or changes to outer blood retinal barrier. METHODS: Fundus images for diabetic retinopathy photoscreening were acquired for a study with Aeon Imaging, EyePACS, University of California Berkeley, and Indiana University...
November 11, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27841790/lipid-supplements-and-clinical-aspects-of-tear-film-in-habitual-lens-wearers
#9
Athira Rohit, Mark D P Willcox, Fiona Stapleton
PURPOSE: To establish the effect of lipid supplements on the tear lipid layer and their influence on lens wear comfort in habitual lens wearers. METHODS: Forty habitual soft contact lens wearers were recruited to a double-masked, randomized crossover trial. An emulsion drop containing phosphatidylglycerine (Systane Balance; Alcon) and a saline drop as a placebo or a liposomal spray containing phosphatidylcholine (Tears again; BioRevive) and a saline spray as a placebo were used three times a day for 2 weeks with 48 hours washout between each intervention...
November 10, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27820717/seasonal-effect-on-ocular-sun-exposure-and-conjunctival-uv-autofluorescence
#10
Kristina M Haworth, Heather L Chandler
PURPOSE: To evaluate feasibility and repeatability of measures for ocular sun exposure and conjunctival ultraviolet autofluorescence (UVAF), and to test for relationships between the outcomes. METHODS: Fifty volunteers were seen for two visits 14 ± 2 days apart. Ocular sun exposure was estimated over a 2-week time period using questionnaires that quantified time outdoors and ocular protection habits. Conjunctival UVAF was imaged using a Nikon D7000 camera system equipped with appropriate flash and filter system; image analysis was done using ImageJ software...
November 4, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27811525/fixation-stability-and-viewing-distance-in-patients-with-amd
#11
Luminita Tarita-Nistor, Esther G González, Taylor Brin, Mark S Mandelcorn, Anne-Catherine Scherlen, Efrem D Mandelcorn, Martin J Steinbach
PURPOSE: People with normal vision perform activities of daily living binocularly, while changing viewing distance frequently and effortlessly. Typically, in patients with age-related macular degeneration (AMD), fixation stability is recorded with monocular instruments at a fixed viewing distance (i.e. optical infinity) to determine the location and precision of the preferred retinal loci (PRLs)-the part of the functional retina that fulfills the role of a pseudo-fovea. Fixation stability recorded with these instruments has been related to performance on visual tasks at shorter viewing distances, although it is not known how viewing distance affects the precision of ocular motor control in these patients...
November 1, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27811524/objectively-measured-light-exposure-in-emmetropic-and-myopic-adults
#12
Lisa A Ostrin
PURPOSE: Light exposure has a close link with numerous aspects of human physiology including circadian rhythm, mood disorders, metabolism, and eye growth. Here, a lightweight wrist-worn device was employed to continuously measure light exposure and activity across seasons and between refractive error groups to assess objectively measured differences and compare with subjectively reported data. METHODS: Subjects, aged 21-65 years (n = 55), wore an actigraph device (Actiwatch Spectrum) continuously for 14 days to quantify light exposure, activity, and sleep...
November 1, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27811523/temporal-characteristics-of-sodium-fluorescein-in-the-tear-meniscus
#13
Maria Markoulli, Nur Amalina Md Isa, Eric B Papas
PURPOSE: To observe the emission intensity profile of sodium fluorescein in the human tear film as a function of time and concentration. METHODS: Twenty-two participants with no dry eye signs or symptoms were randomly allocated to receive 1 μL of either a 2 or 10% concentration of fluorescein to one eye. Images of the inferior tear meniscus were captured at regular intervals over 30 minutes and the process repeated for the other eye with the alternate concentration...
November 1, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27801692/histopathology-of-subcapsular-cataract-in-a-patient-with-atopic-dermatitis
#14
Daisy Yao Shu, Keith Ong, Frank J Lovicu
PURPOSE: To report the histopathological features of anterior subcapsular cataract associated with atopic dermatitis. CASE REPORT: A 29-year-old man with atopic dermatitis presented with bilateral anterior subcapsular cataract. After routine cataract surgery, the anterior subcapsular cataractous tissue was obtained as an anterior capsulorhexis flap and prepared as a wholemount for histological analysis. The wholemount consisted of a well-demarcated central grayish-white plaque surrounded by transparent capsule, corroborating the slit-lamp biomicroscopic appearance...
October 31, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27792060/ocular-focusing-behavior-of-the-one-eyed-child
#15
N Geetha Sravani, Shrikant R Bharadwaj
PURPOSE: To compare the accommodative gain and pupil miosis of children with only one functional eye with the binocular and monocular accommodative and pupil responses of typically developing age-matched controls. METHODS: Forty-one uniocular cases and 43 controls (3-14 years for both cohorts) watched a cartoon movie on an LCD screen that ramped between 90 and 30 cm, with a stable period of 4 seconds at both viewing distances. Cases performed the task with their only functional eye whereas controls performed the task binocularly and monocularly...
October 27, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27779556/multimodal-imaging-of-serpiginous-choroiditis
#16
Hashim Ali Khan, Muhammad Aamir Shahzad
PURPOSE: To report a case of atypical serpiginous choroiditis with previously unreported findings on optical coherence tomographic angiography. CASE REPORT: A 35-year-old otherwise healthy man had a 1-week history of vision loss in his right eye. The visual acuity in right eye was counting fingers at 1 meter. Fundoscopy showed a classic peripapillary serpiginous lesion and a solitary macular lesion. Fundus fluorescein angiography revealed early hypofluorescence of active lesions with gradual increase in fluorescence across the phase of angiogram...
October 25, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27776084/the-visual-impact-of-lens-induced-astigmatism-is-linked-to-habitual-axis
#17
Amy R Hughes, Edward A H Mallen, David B Elliott
PURPOSE: Many studies have assessed the visual impact of astigmatism by inducing it using loose trial lenses at set axes. There are conflicting opinions and some confusion about the results, but the reduction in vision is typically least with lens-induced with-the-rule astigmatism. In this study, we determined whether a participant's habitual astigmatism influences the impact of lens-induced astigmatism on distance visual acuity (VA). METHODS: Participants included 35 adults (age range 19-79, average 41...
October 22, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27755235/late-recognition-of-a-case-of-oculo-auriculo-vertebral-spectrum
#18
Jeylan El Mansoury, Joyce N Mbekeani
PURPOSE: To report the late recognition of a case oculo-auriculo-vertebral spectrum (OAVS). CASE REPORT: A 14-year-old male patient with a history of spinal scoliosis and anal atresia presented with a right ocular growth that was increasing in size and causing irritation. He was discovered to have a right limbal dermoid and forniceal lipodermoid. All visual functions were normal and the rest of the anterior and posterior segments were unremarkable. External examination revealed facial asymmetry and ipsilateral hemifacial microsomia and a pre-auricular skin tag...
October 13, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27748699/power-profiles-of-commercial-multifocal-soft-contact-lenses
#19
Eon Kim, Ravi C Bakaraju, Klaus Ehrmann
PURPOSE: To evaluate the optical power profiles of commercially available soft multifocal contact lenses and compare their optical designs. METHODS: The power profiles of 38 types of multifocal contact lenses-three lenses each-were measured in powers +6D, +3D, +1D, -1D, -3D, and -6D using NIMO TR1504 (Lambda-X, Belgium). All lenses were measured in phosphate buffered saline across 8 mm optic zone diameter. Refractive index of each lens material was measured using CLR 12-70 (Index Instruments, UK), which was used for converting measured power in the medium to in-air radial power profiles...
September 29, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27668641/academic-difficulty-and-vision-symptoms-in-children-with-concussion
#20
Mark W Swanson, Katherine K Weise, Laura E Dreer, James Johnston, Richard D Davis, Drew Ferguson, Matthew Heath Hale, Sara J Gould, Jennifer B Christy, Claudio Busettini, Sarah D Lee, Erin Swanson
PURPOSE: Academic difficulty is reported in children with prolonged post-concussive symptoms. Despite growing evidence that vestibular-ocular and vision-specific dysfunction are common in children after concussion, vision is rarely mentioned in return-to-learn protocols. The purpose of this project was to evaluate a cohort of children with prolonged post-concussive symptoms to determine if vision symptoms are associated with those reporting academic difficulty. METHODS: Data were obtained from the Children's of Alabama Concussion Clinic REDCap dataset from the period January 2007 to October 2013...
September 23, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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