CMAA

CMAA 100 question Baseline Test on Thursday, Feb 9

CMAA Chapter 2 & 3 Test on Tues. Feb. 14, 2017

Week of 01/09/17 Visual Acuity

Objectives:
The student will be able to:

• Describe the importance of vision screening and early identification
• Determine distance for a variety of visual acuity testing needs
• Determine proper lighting and placement (sitting, standing) to achieve the optimum contrast sensitivity
• Document vision screening results

Visual acuity measurement is a good screening tool because normal visual acuity requires that all levels of the visual system function properly.  The optical system of the eye must project a sharp image of the outside world onto the retina.  The retina must then be able to translate this image into neural impulses. Finally, the neural impulses must travel to the brain, where they are analyzed and recognized.  Therefore, a wide array of different visual disorders (but not all) can affect visual acuity.

Because visual acuity is so easily measured, it is often used as a primary eligibility criterion, such as 20/20 for a pilot’s license, 20/40 for a driver’s license, 20/200 for certain disability benefits.

STUDY RESOURCES:

Snellen Chart

What does "20/20 Vision" mean? Optimal Vision With your Spectacles Glasses Video

ACTIVITY:
1. Visual Acuity Testing

TEST: Written and Practical - TBA

Face Shapes

Choosing the Right Frame

Homelearning: Due Tuesday, December 6: Other than the famous people mentioned above, research your own famous or non famous person that will match each face shape. Picture must be provided.  Use PowerPoint or Microsoft to present to your classmates on Tuesday

Test

TEST: Written Portion Nov. 17
Hands-on Skill Lab Performance Test: Nov. 17
1. Pupillary measurement   
2. Frame measurements

LAB COAT REQUIRED
MAKE SURE YOUR ELECTRONIC DEVICES ARE CHARGED. WRITTEN PORTION IS ONLINE

LINK: https://b.socrative.com/login/student/ 
Room name: MSLAINEZ

Frame Measurements: Boxing System

Boxing System

In 1962 the Optical Manufacturers Association adopted the boxing system to provide a standard for frame and lens measurement that greatly improved upon the accuracy of previous systems. The boxing system is based upon the idea of drawing an imaginary box around a lens shape with the box's sides tangent to the outer most edges of the shape. The system uses the sides of the boxes as reference points for the standard system of measurements.

"A" Measurement - The horizontal distance between the furthest temporal and nasal edges of the lens shape or the distance between the vertical sides of the box. The A measurement is also commonly known as the eyesize.
"B" Measurement - The vertical distance between the furthest top and bottom edges of the lens shape or the distance between the horizontal sides of the box.
Datum Line - The horizontal line that runs through the vertical center of the frame.
Geometric Center (GC) - The intersection of the Datum Line and horizontal centers of each lens shape.
Distance Between Lenses (DBL) - The shortest distance between the nasal edges of each lens or the distance between boxes. DBL is also commonly referred to as bridge size.
Distance Between Centers (DBC) - The horizontal distance between the geometric centers of the lenses. DBC is also know as the Geometric Center Distance (GCD), but more commonly referred to as the frame PD. In theory the DBC can be calculated by adding the "A" Measurement to the DBL as marked on the frame, however in practice the calculation may differ from the actual measurement.

Note: Frames are typically marked for size, for example: 54-18, where 54 is the "A" Measurement and 18 is the DBL.

Effective Diameter (ED) - Twice the distance from the geometric center of the lens furthest edge of the lens shape. The ED can also be defined as the smallest diameter lens that would cutout, if the frame's geometric center matched the lenses optical center. ED is used in combination with decentration distance to select the minimum lens blank size required to fit a given frame.
Seg Height - The vertical distance between the bottom edge of the box and the top of the bifocal or trifocal segment
Seg Drop - The vertical distance between the Datum line and the top of the bifocal or trifocal segment Overall
Temple Length (OTL) - The running distance between the middle of the center barrel screw hole and the end of the temple.
Length to Bend (LTB) - The distance between the center of the barrel and the middle of the temple bend.
Front to Bend (FTB) - The distance between the plane of the front of the frame and the temple bend. Used if there is a significant distance between the frame front and the beginning of the temple.

Capstone Portfolio 2nd Check

A second check of your portfolio will be done. Refer to your Portfolio content checklist; In it you need:

Part 1: Professional Documents
Revised and Printed in sheet protectors

Part 2: Letter of Recommendations

Electronic version of the portfolio will not be accepted. Please print and place paperwork in sheet protectors.


Checklist

DUE 11/03/2016

Capstone Letters

Hello Seniors!

As  you are well aware Capstone Portfolios are the HEART of Turner Tech! We take pride in what we do! Here are some deadlines you need to be aware of:

Parent Letter: DUE 10/25/2016

Capstone Portfolio 1st Check: DUE 10/25/2016

Mentor Letter: DUE 10/28/2016

Thesis  Development: DUE 10/28/2016

Our goal in VA4 is to be done with our portfolios before Christmas Break! It will take lots of work and dedication from each and every one of you but I know that we can accomplish it!