5/18/2023 0 Comments Sensibilidad al contrasteAdemás, la precisión del examen visual puede mejorarse con el uso de un método psicofísico adecuado.Ĭontrast sensitivity function Desempeño visual Dispositivos de tableta EFAC FACT Función de sensibilidad al contraste Tablet devices Visual performance iPad.Ĭopyright © 2014 Spanish General Council of Optometry. La nueva aplicación ClinicCSF para el iPad retina no reflejó diferencias significativas con el test FACT al utilizar los mismos pasos de sensibilidad al contraste. Sin embargo, los intervalos de confianza del 95% para las diferencias medias entre ClinicCSF y FACT fueron inferiores para la versión que incorporó un método psicofísico de escalera ( ClinicCSF.v1), principalmente para frecuencias espaciales de 6, 12 y 18 cpg. La mejor concordancia con el FACT se obtuvo con el ClinicCSF.v2, no hallándose diferencias significativas en todas las frecuencias espaciales evaluadas. ![]() Se hallaron diferencias de FSC estadísticamente significativas en ambos grupos debido al cambio de versión del ClinicCSF (p < 0.05), mientras que no se manifestaron diferencias con el test FACT. Se representaron las concordancias entre ClinicCSF y FACT para frecuencias espaciales de 3, 6, 12 y 18 ciclos por grado (cpg) mediante gráficos de Bland–Altman. v2) para medir la FSC de cada grupo con el mismo iPad, comparándose los resultados obtenidos con los medidos con el test FACT. Se utilizaron diferentes versiones del ClinicCSF (.v1 y. ![]() Se distribuyeron 42 sujetos en dos grupos de 21 personas. Introducir una nueva aplicación ( ClinicCSF) para medir la Función de Sensibilidad al Contraste (FSC) con dispositivos de tableta, y compararla con el test Functional Acuity Contrast Test ( FACT). In addition, it is shown that the accurateness of a vision screening could be improved with the use of an appropriate psychophysical method. The new ClinicCSF application for iPad retina showed no significant differences with FACT test when the same contrast sensitivity steps were used. However, the 95% confidence intervals for mean differences between ClinicCSF and FACT were lower for the version which incorporated a staircase psychophysical method (ClinicCSF.v1), mainly for spatial frequencies of 6, 12 and 18 cpd. The best agreement with the FACT was found with the ClinicCSF.v2 with no significant differences in all the evaluated spatial frequencies. Statistically significant differences in CSF of both groups were found due to the change of the ClinicCSF version (p<0.05) while no differences were manifested with the use of the same FACT test. The agreements between ClinicCSF and FACT for spatial frequencies of 3, 6, 12 and 18 cycles per degree (cpd) were represented by Bland-Altman plots. v2) were used to measure the CSF of each group with the same iPad and the results were compared with those measured with the FACT. Different versions of the ClinicCSF (.v1 and. It is suggested that CS tests be included in their regular eye examination.To introduce a new application (ClinicCSF) to measure Contrast Sensitivity Function (CSF) with tablet devices, and to compare it against the Functional Acuity Contrast Test (FACT).Ī total of 42 subjects were arranged in two groups of 21 individuals. Conclusions: CS tests can detect visual disturbance in thalassemic patients before the impairment of visual acuity. No significant relationship was observed between CS values and duration of transfusion, serum ferritin concentration and dose of chelation therapy (P > 0.05). Comparing those who used deferasirox with healthy subjects, contrast threshold was higher in deferasirox group at all special frequencies (P > 0.05). Por tanto un paciente que necesite mucho contraste para poder distinguir un objeto presentar un valor de SC muy bajo y viceversa. ![]() LaSensibilidad al Contrastese define como la inversa del umbral al contraste. Results: In visual acuity tests, thalassemic patients did not have any problem. All data analysis was performed using SPSS, version 17. Contrast threshold was assessed with the use of Freiberg visual acuity and contrast test under the mesopic light condition for three frequencies 1, 5, 15 cpd. All subjects had a set of examinations including refraction, visual acuity, Biomicroscopy, ophthalmoscopy and CS. Methods: In this cross sectional study a total of 60 β-thalassemia patients (30 used deferoxamine and 30 used deferasirox) were regarded as case group and 30 age and sex matched healthy subjects were selected as control group. Purpose: To compare contrast sensitivity (CS) in multi-transfused β-thalassemia patients who received deferoxamine with those who received Osveral.
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5/18/2023 0 Comments Gridded matting rug makingSomeone who knits, crochets, or crafts can be a great help in getting you going.
5/18/2023 0 Comments Vinyl car wrapPaint is much higher-maintenance than vinyl, across the board. It’s a whole new way of thinking about customization. From the inside, you’ll see a light, continuous tint, but from the outside, viewers will see any color or image you want to place there. If you like tinted glass, you may even want to consider having the windows wrapped with perforated decals. Graphics of any kind can be reproduced on vinyl, so your imagination is the limit. And you can achieve the metallic “$60K effect” for about the same price as any other wrap. You can opt for metallic, textured, and matte finishes with vinyl. Wraps give you all the customization options of paint, plus many more. How much can you spend on one? Custom, metallic paint jobs on high-end sports cars have been known to run upwards of $60,000. Custom paint jobs are applied by skilled artists who don’t work cheap. paintĪ custom paint job for a full vehicle obviously costs more than the $3K – $10K mentioned above. For personal vehicles, it’s a very economical alternative to paint, whether you go with old-school, solid colors or eye-catching graphics, which brings us to customization … Customizing vinyl vs. For company vehicles, this kind of cost is a no-brainer because wraps also function as advertising. ![]() A good paint job for an average vehicle will set you back between $3,000 and $10,000-not necessarily so affordable.Ī full vehicle wrap typically costs between $2,500 and $5,000. It may fade or chip more quickly than a higher-quality paint job, but it’s affordable. At the low end, painting a full vehicle costs around $1,000. We mentioned that paint jobs come in all levels of quality, dependent on the type of paint used, application methods, and how many coats are applied. With vinyl wraps, you can apply eye-catching graphics-or just colors and patterns that make a personal statement-them remove them when it’s time to sell the car (or update the design). If your vehicle is painted with company graphics, you’ll have a tough time selling it for what it’s worth, and furthermore, do you really want a stranger driving a vehicle that has your logo on the side? When you paint, you’re stuck with the vehicle’s appearance until you invest a significant amount of money in removing it. On the other hand, paint is permanent, short of sanding it off. This also means the paint that’s exposed when the vinyl is removed will look as bright as the day it was wrapped, having been protected from the elements. One of the best qualities of vinyl is that it can be removed without damaging the paint beneath. All we have to do is wash the car, dry it, and start applying vinyl. Once your design is finalized, it’s usually a 3-day maximum for installation. Wraps take far less time to apply than paint. If the paint shop isn’t busy, you may have your car back in 3-5 days for a low-cost paint job, but 1 to 3 three weeks is more common for the average paint job. Some paint jobs cost less because they use fewer coats, but prep and drying processes still add to the amount of time you’ll be without your vehicle. ![]() Each coat of new paint will need to dry for 8 hours or so.The old paint will need to be removed, which takes time.Paint jobs come in a wide variety of quality and price ranges, but three things are constant: Will you have to rent a car if the vehicle is in the shop for too long? Wraps and paint are applied to vehicles in very different ways, which affect the amount of time you’ll be without your ride. When you’re trying to decide between vinyl and paint, the first question to ask is: How long can you be without your vehicle? This is no small thing if it’s your only transportation. Car wrap or paint? Apply vinyl or apply layers of paint? A wrap can be a solid color or a simple color scheme that looks exactly like paint to the casual eye, so even if you’re not trying to make a big statement with your vehicle, vinyl can be an affordable alternative to paint. A vinyl wrap is the medium of choice for vehicle advertising because it costs much less than a custom paint job, and it offers significantly more design and finish options than paint.īut with prices so reasonable, wraps are now becoming the preferred method of “repainting” for private vehicle owners, as well. If you’ve seen vehicles with wild, eye-catching graphics or strangely luminous colors, you’ve probably seen vehicle wraps. Let’s take a closer look at the pros and cons of wrapping vs. In recent years, wraps have become so popular that prices have dropped dramatically, making them a cheaper option than paint in many cases. Wraps were actually invented in the 1950s, but they were costly, so their use was limited to high-end vehicles. ![]() But that was before the vinyl wrap became an affordable, mainstream product. Until recent years, you had exactly one option if you wanted to upgrade the look of your vehicle: repaint it. |