What and how to measure?

Visage Cambridge Research System

I'm talking about my new project so called measuring the habitual pupil size and it's color. Well, it is obviously to looked if there any relation between pupil size and the iris colour despite to measure pupil diameter size on 2 different illuminations scotopic (<> 50 lux). Both of these need to be measured first prior data collection. 

Well, the problem is how to measure. Emm, today i was introduced a new instrument called Visage Cambridge Research System. Honestly it looks like an old monitor with weird stuff but it is very brilliant and wicked in measuring data with numerous stimuli that could be performance. Okay, just straight to the point, I somehow do not understand how it works!!!! Argghhh..

A'way, back to the methodology part.. what i need to measure are:

1. Refractive error (to avoid bias as hyperopic tends to have smaller pupil compare to myopic)
2. Pupil Size (needs to be done in 2 illuminations - i need figure out how to measure the lux so that it must represents the scotopic and photopic; what is the target, how and either to control illumination of the room or the monitor ataupun kedua2nyer skali)
3. The Latency Pupil Reflex (a condition when stimulus (flash light) is given and the pupil reaches the maximum constriction)
4. The Dynamic Pupil reflex (a condition when the pupil need to change from scotopic to photopic condition. How does it take? i think it must be in second)
5. The Iris photo (i need to have tripod so that it helps me to produce good quality of pictures without flash so that iris grouping can be done precisely)

The problem is: How to command the Visage Cambridge Research System (HS video tracker tools nie) to follow what you need for the outcome???

• Command tu kena, prepare betul2 what u need to measure and asked Henson how to do it..
• Well, maybe for #2; u just need to set up in those 2 ills and measure them from very beginning till the last (the special about this alat, it got 250Hz digital camera: meaning that it can capture the 250 images in a second!!!) thus, bayangkan how many images would be captured if the duration pupil changes from sco to pho more than 3 minutes!!!) Such a waste data....
  
• However, by doing that, u could measure accurately the pupil changing..:) ~ aim #3 and #4 accomplished!! BUT: i need it in form of chart.. then, need to figure out how to do that.. And a lot of analysis need to be carried out later... SPSS x install lagi..

How to categorized your data so that it produces a good quality of data even the results give no significant difference (satu benda lagi need to open the statistic book....)

And Pilot study needs to be held so that u know whether the instrument can provide what u want.. Is it follow all your hypothesis or expectation..

During this time, u need to look whether or this instrument measure the pupil dynamic and pupil latency..

Hmmm.. seems that lots and lots of stuff need to be carried out.. 

Salam fae..

Meet  u  again!!