• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
8) All the following are true regarding glaucoma medications except:
8) All the following are true regarding glaucoma medications except:

... characterized by: A. Thickening of the retina at or within 500 microns of the center of the macula B. Hard exudates at or within 500 microns of the center of the macula, if associated with thickening of adjacent retina C. A zone or zones of retinal thickening 1 disc area or larger, any part of which ...
2.1Mb - Community Eye Health Journal
2.1Mb - Community Eye Health Journal

... per day for 40 years is associated with a threefold increase in the risk of AMD. Even passive smoking is associated with an increased risk, but stopping smoking appears to reduce the danger. Possibly 15 per cent of AMD cases are caused by smoking. Genetic influences are also important. Several recen ...
Cryotherapy for retinopathy of prematurity a prospective study
Cryotherapy for retinopathy of prematurity a prospective study

... age norms and this will be the subject of a longer follow-up study. Despite these limitations our results highlight a better visual outcome in eyes with normal posterior poles and a poorer outcome in eyes with cicatricial disease, although some maintain at least navigational vision. The effect of cr ...
Document
Document

... variety of vitreoretinal pathologies. However, sclerostomy is still necessary in the TSV25 and this may induce complications associated with retinal disease. On the other hand, in cataract surgery alone, it is possible to reduce postoperative inflammation with a clear corneal incision rather than a ...
Dynamic visual stimulus presentation in an adaptive optics scanning
Dynamic visual stimulus presentation in an adaptive optics scanning

... patterns can constantly be added to these buffers thereby permitting retinal stimulation with arbitrary dynamic stimuli of virtually infinite duration (for an animation, for example). Direct Memory Access transfers are used between the ring buffer and the UF6021 so as to transfer patterns from compu ...
Evolution of Vitreo Retinal Surgery
Evolution of Vitreo Retinal Surgery

... with 25-gauge instruments. In addition, distinctly higher infusion and aspiration rates could safely be expected with the 23- gauge system than are obtained with the 25-gauge system, so that careful and extensive vitreous removal, which should continue to be the standard routine, would pose no probl ...
04/23 PPT
04/23 PPT

... -- If you force inputs from the two eyes to be correlated (synchronous stimulation), you can prevent competition and OD segregation -- If you make the inputs from the two eyes even less correlated (asynchronous stimulation or strabismus), you enhance competition and OD segregation (there will be ver ...
Vision B
Vision B

... is released. 4 Lack of IPSPs in bipolar cell results in depolarization. 5 Depolarization opens voltage-gated Ca2+ channels; neurotransmitter is released. ...
Electroretinography in dogs: a review
Electroretinography in dogs: a review

... electrodes are used: from mono- or bipolar contact lens electrodes, such as the Burian-Allen, Kooijman (Figure 5) and Jet (Figure 6) to gold-foil electrodes and Dawson-Trick-Litzkov fibre electrodes (Burian and Allen 1954; Lawwill and Burian 1966; Arden et al. 1979; Dawson et al. 1979; Kooijman and ...
ARVO 2015 Annual Meeting Abstracts 463 The Choroid: Connecting
ARVO 2015 Annual Meeting Abstracts 463 The Choroid: Connecting

... and the inflammatory cells of choroid, mast cells and macrophages. We have assessed the viability of choroidal vessels using enzyme histochemistry to stain for endogenous alkaline phosphatase activity, a marker for the choroidal vasculature (McLeod et al, IOVS, 1994). Although transport from the CC ...
Protective Effects of Morus albaLeaves Extract on Ocular Functions
Protective Effects of Morus albaLeaves Extract on Ocular Functions

... blood was collected in non-heparinized tube and centrifuged at 5,000 x g for 15 min at 4°C and serum was collected. Serum levels of total cholesterol (21) (Deeg and Ziegenhorn, 1983), triglycerides (22) and HDL (23) were determined. LDL-cholesterol concentration (LDLc) was calculated from the total ...
Proliferative diabetic retinopathy
Proliferative diabetic retinopathy

... What are the signs and symptoms? Proliferative Diabetic Retinopathy (PDR) often occurs without any early warning signs, which is why regular retinal examination is critical in patients with diabetes. Bleeding from abnormal blood vessels may be seen as floaters in the vision, or as dramatic vision lo ...
3rd Annual Vit-Buckle Society Meeting
3rd Annual Vit-Buckle Society Meeting

... was the first to describe the use of the semiconductor diode laser for retinal photocoagulation, and he did pioneering basic science research in excimer laser photoablation and optical breakdown and photodisruption. He established a major optical imaging program while at the university of Miami, and ...
Central retinal vein occlusion concomitant with dengue fever
Central retinal vein occlusion concomitant with dengue fever

... HB hemoglobin, HCT hematocrit, PLT platelet, WBC white blood cell ...
The Achiever Dec 14 - Retina Australia Victoria
The Achiever Dec 14 - Retina Australia Victoria

... very clear “layman’s terms” explanation of what stem cells are, and the difference between embryonic and adult stem cells. They also talked about their work in creating biopsies from skin cells of people with inherited retinal disease, which in turn will help them learn about the disease and assist ...
Retinal Detachment Model in Rodents by
Retinal Detachment Model in Rodents by

... of subretinal hemorrhage with this protocol was significantly less than that with other protocols. If choroidal bleeding occurs during the scleral incision step, it will exit the eye through the scleral wound because this step is performed before reducing intraocular pressure. If choroidal bleeding ...
HP3213501362
HP3213501362

... computation [49a] and retinal imaging is not a new one. Finally, the ophthalmoscope was reinvented again and reported by von Helmholtz in 1851 [50]. Thus, inspection and evaluation of the retina became routine for ophthalmologists, and the first images of the retina were published by the Dutch ophth ...
2014-2015 Gross Anatomy of the eyeball: The eyeball lies in a
2014-2015 Gross Anatomy of the eyeball: The eyeball lies in a

... 2- The middle coat (uvea or uveal tract): consists of the posterior part which is called the Choroid, a triangular shape muscular thickening called ciliary body and anteriorly, diaphragm like structure called the iris. The iris perforated centrally by regular and round opening called the pupil. Fun ...
The Anatomy and Histology of the Rudimentary Eye ol Neurotrichus
The Anatomy and Histology of the Rudimentary Eye ol Neurotrichus

... membrane is distinguishable.A few scatered epithelial cells may representthe corneal mesenchymalepithelium. The choroid is a denselypigmented layer enveloping the globe of the eye excePt for rhe small pupillary aperture.At the ciliary body the choroid is much thickened,and here the pars ciliaris ret ...
Eyeball Top View of Right Eye Cornea – Transparent membrane on
Eyeball Top View of Right Eye Cornea – Transparent membrane on

... cross-linked collagen bands. The ordering of these bands is somewhat regular to promote transparency. The thickness of the stroma is about 500 µm. The collagen fibers are somewhat regularly organized, introducing corneal birefringence Descemet’s Membrane – Collagen boundary roughly 4 to 10 µm thick ...
2 eng stages of sleep
2 eng stages of sleep

... V), in the different parts of the brain. These variations generate waves of different frequencies and widths during the different stages of the waking-sleeping cycle. b) An analysis of the electroencephalogram shows us how the stages of sleep alternate in cycles (NREM sleep, stages I-IV; REM sleep, ...
Eye (iowa)
Eye (iowa)

... The retina has 10 recognized layers. The main layers are outlined in this section. The outermost segment is the retinal pigmented epithelium. This cell layer contains melanin, and is responsible for light absorption. It is important to note that light travels through all 9 layers of the retina after ...
Retinitis pigmentosa - Macular Disease Foundation Australia
Retinitis pigmentosa - Macular Disease Foundation Australia

... and they have the potential to replace damaged or missing retinal cells. The aim of stem cell research is to see if stem cells can be persuaded to differentiate into retinal cells which can then be injected into the retina, replacing the damaged cells. ...
PDF
PDF

... Non-ionizing radiation, which is produced in large amounts by welding arcs, may induce photophthalmia, keratoconjunctivitis and cataracts. Retinal injuries resulting from exposure to electric welding arcs have been reported, but such injuries are not commonly seen and may be misdiagnosed. A case is ...
Extended Criteria for Vitrectomy and Fluid/Silicone Oil
Extended Criteria for Vitrectomy and Fluid/Silicone Oil

... complications associated with the use of intra­ ocular silicone oil have until recently restric­ ted its use in all but desperate cases. 1-8 Recent reports suggest, however, that serious compli­ cations can be avoided if silicone oil is removed at an early stage, while the long­ term effects associa ...
< 1 ... 17 18 19 20 21 22 23 24 25 ... 40 >

Retinal waves

Retinal waves are spontaneous bursts of action potentials that propagate in a wave-like fashion across the developing retina. These waves occur before rod and cone maturation and before vision can occur. The signals from retinal waves drive the activity in the dorsal lateral geniculate nucleus (dLGN) and the primary visual cortex. The waves are thought to propagate across neighboring cells in random directions determined by periods of refractoriness that follow the initial depolarization. Retinal waves are thought to have properties that define early connectivity of circuits and synapses between cells in the retina. There is still much debate about the exact role of retinal waves; some contend that the waves are instructional in the formation of retinogeniculate pathways, while others argue that the activity is necessary, but not instructional in the formation of retinogeniculate pathways.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report