{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

2007-10-30 - Read Chapter 5 page 156-203 Duplex Theory of...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
2007-10-30 Read Chapter 5: page 156-203 Duplex Theory of Vision 100 years old, but confirmed by modern research Rods and cones handle distinct aspects of the visual task Rods: night vision; low light; colourless – ‘achromatic’… but low acuity Cones: day vision; require stronger light intensities; colour sensations – hi acuity Lowest to strongest light sensitivity: 1-1x10 11 The eye: hardly a perfectly designed camera o What does this tell us about natural selection and evolution? The photoreceptors – transforming light into neural signals Laser Eye Surgery LASIK surgery o Laser assisted IN Situ Keratomileusis Vaporizes tissue and reshapes cornea, and thus, its refractive power Corrects short/far sightedness, astigmatism… Some risks – halos and glare o US-FDA site:  www.mhhe.com/blake5 Worsening Eye Problems Likely a function of increasing inelasticity of lens… Myopia (nearsightedness) worsens with years of ‘close’ work Presbyopia happens with age in all people Brightness Contrast What produces edge enhancement? Mach bands… Differences between contrasting brightness is enhanced by the visual system o Neural activity in one area inhibits activity in a neighbouring area: lateral  inhibition Mach Bands
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern