Reflective Road Line Car Park Marking Paint (2.5 Litre, White)

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Shapes and patterns can have many different lines of symmetry. This all depends on how many times the shape can be folded in half, yet still remain the same on both sides. A circle, for example, has an infinite number of lines of symmetry because there are more ways of folding it in half than there are of counting. Other shapes, like a love heart, can only be folded in half one way.

This resource is also available in Scottish Gaelic. Perfect for Gaelic learners! What is reflective symmetry? Symmetry Children will not learn the concept of symmetry until it is introduced to them in Year 2. They will be asked to identify line symmetry with a verticle line.

Hwang JU, Sohn J, Moon BG, Joe SG, Lee JY, Kim JG, et al. Assessment of macular function for idiopathic epiretinal membranes classified by spectral-domain optical coherence tomography. Invest Ophthalmol Vis Sci. 2012;53:3562–9. In addition to helping drivers stay in the correct lane and spot upcoming bends, reflective studs can also help to reduce the risk of accidents. By providing an increased level of visibility, these studs can help drivers to spot any potential hazards before they reach them, allowing them to take the necessary precautions. Even if it is not immediately obvious from the description, many of the academic assignments you will need to complete contain some form of reflection. You might be asked to write an essay where you respond to a piece of text or an image, relate a topic to your own experiences or discuss whether a certain model fits with your own views. Reflection can also be useful when constructing an academic argument as you will have to think about how all the evidence fits with your own understanding of a topic. Being able to reflect on something is also an important part of critical thinking and writing as it allows you to question arguments made in the literature, be open minded about different approaches and move towards being constructive in your criticism. With any of these assignments it's important to remember not to include too much description and focus on what you are being asked to do. The assessor will understand what the object you are looking at is and they don't need it described to them. They want to know what you think about it, how it relates to your experiences and how this advances your knowledge of a topic. You Q, Xu L, Jonas JB. Prevalence and associations of epiretinal membranes in adult Chinese: the Beijing eye study. Eye. 2008;22:874–9.

Tsunoda K, Watanabe K, Akiyama K, Usui T, Noda T. Highly reflective foveal region in optical coherence tomography in eyes with vitreomacular traction or epiretinal membrane. Ophthalmology. 2012;119:581–7. Reflective symmetry is where a shape or pattern is reflected in a mirror line or a line of symmetry. The shape that has been reflected will be the same as the original, it should also be the same size and it will be the same distance away from the mirror. What is Rotational symmetry? Epiretinal membranes (ERMs) are avascular fibrous layers characterized by abnormal fibrocellular proliferation on the inner retinal surface with a prevalence ranging from 2.2 to 28.9%, and they are more common in elderly people [ 1, 2, 3, 4]. ERM involving the macular or peri-macular regions can cause visual impairment, metamorphopsia, micropsia, and occasionally monocular diplopia. Although ERMs may develop secondary to cataract surgery, retinal detachment, retinal vein occlusions, diabetic retinopathy, or uveitis and retinal tearing, most cases are idiopathic [ 5, 6, 7]. Fraser-Bell S, Guzowski M, Rochtchina E, Wang JJ, Mitchell P. Five-year cumulative incidence and progression of epiretinal membranes: the Blue Mountains Eye Study. Ophthalmology. 2003;110:34–40.

Mori K, Gehlbach PL, Sano A, Deguchi T, Yoneya S. Comparison of epiretinal membranes of differing pathogenesis using optical coherence tomography. Retina. 2004;24:57–62. Much like the red studs, these are in place to help drivers know where the lines between the third lane and the central reservation are in low light and difficult weather conditions. White

The presence of microcystoid retinal changes or the cotton ball sign had no significant effect on BCVA ( p = 0.548 and 0.861, respectively). However, eyes with EIFL or disruption of the ellipsoid zone were associated with significantly higher BCVA values in logMAR ( p< 0.001 and p = 0.009, respectively) (Table 2). You will also see these across many other types of roads to show the boundaries of driving lanes. Fluorescent Green and Yellow Studs Uji A, Murakami T, Unoki N, Ogino K, Nishijima K, Yoshitake S, et al. Parallelism as a novel marker for structural integrity of retinal layers in optical coherence tomographic images in eyes with epiretinal membrane. Am J Ophthalmol. 2014;157:227–36. Fraser-Bell S, Ying-Lai M, Klein R, Varma R. The Los Angeles Latino Eye Study Group. Prevalence and associations of epiretinal membranes in Latinos: the Los Angeles Latino Eye Study. Invest Ophthalmol Vis Sci. 2004;45:1732–6. Both preparing for and writing job applications contain elements of reflective writing. You need to think about the experiencethat makes you suitable for a role and this means reflection on the skills you have developed and how they might relate to the specification. When writing your application you need to expand on what you have done and explain what you have learnt and why this matters - key elements of reflective writing. 2. AppraisalsIn addition to EIFL, frequency of cystoid macular changes, ellipsoid disruption, and the cotton ball sign significantly increased from stage 1 through stage 4 in the study by Govetto et al. [ 22]. Similarly, in our study, the rate of cystoid changes, cotton ball sign, and disruption of the ellipsoid zone increased with increasing stage of ERM. However, whereas neither the presence of cystoid changes nor the cotton ball sign had a significant effect on BCVA, disruption of the ellipsoid zone was associated with significantly higher BCVA values in logMAR. On the other hand, none of these SD-OCT findings were found to be an independent predictor of visual acuity in a multivariate linear regression model. In eyes with ERM, disruption of the ellipsoid zone has been reported to be negatively correlated with visual outcomes in multiple studies [ 14, 31]. However, in our study, we did not find a correlation between disruption of the ellipsoid zone and visual acuity, probably due to the small number of patients with ellipsoid zone disruption. In the third lane, you may see amber coloured reflective studs. These show the line that shouldn’t be crossed into the central reservation. Okamoto F, Sugiura Y, Okamoto Y, Hiraoka T, Oshika T. Time course of changes in aniseikonia and foveal microstructure after vitrectomy for epiretinal membrane. Ophthalmology. 2014;121:2255–60. Continuous EIFL was defined on OCT as the presence of a continuous hypo- or hyper-reflective band, extending from the inner nuclear layer and inner plexiform layer across the foveal region, as described before by Govetto et al. [ 22]. Disruption of the inner segment ellipsoid zone was defined as a discontinuous ellipsoid band in the foveal region, and the presence of the cotton ball sign was defined as a round or diffuse hyper-reflective area between the ellipsoid zone and the cone outer segment tip line at the central fovea, as described by Tsunoda et al. [ 23]. The microcystoid retinal changes were described as the presence of multiple, small hypo-reflective roundish-elliptical cystoid spaces in retinal layers.