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تحميل الدليل التدريبي

أسئلة شائعة


 

  

COMPARISON OF CENTRAL CORNEAL THICKNESS MEASUREMENTS USING ULTRASOUND PACHYMETRY, ULTRASOUND BIOMICROSCOPY, AND ARTEMIS2 IN NORMAL EYES.               

                                (Under process to be published in JCRS)

             Haya  M. Al-Farhan, Ph.D,  Wafa’a  Majed  Al-Otaibi, MSc.

                                                         2012

King Saud University, College of Applied science, Department of Optometry and Visual Science.

There is no public and private financial support

   **********

Oscillatory potentials investigation among healthy female students from different ages.

(Not published yet) 

Prepared by: Wafa'a M. Al-Otaibi, BSc

Supervised by: Dr. Yousef Al-debasi, Ph.D

2006

  

Abstract

Purpose:

      Where an ophthalmic electrophysiology clinic has been inaugurated in the department of optometry, therefore, we would like to establish normative of data for the oscillatory potentials (OPs) of the electroretinogram (E.R.G) for our equipment (Tomey PRIMUS) in  fifty- seven healthy volunteers ranging age  ( from 18 to 25 ) years to compare and interpret our result with patient population as recommended by International Society for Clinical Electrophysiology of Vision (ISCEV).

Materials and Methods:

     Fifty-seven normal volunteers are subjected to OPs measurements following the standard set by the International Society for Clinical Electrophysiology of Vision (ISCEV).

   OPs were evaluated in scotopic conditions, follwing pupillary dilation and dark adaptation. Electrical signals were recorded with HK Loop in response to white flashes, by using full-field (Ganzfeld ) stimulation (Tomey PRIMUS).No need to wear a corrective glasses, because the responses have taken from the whole of the retina. 

Results:

    The amplitude of most OPs recorded under scotopic condetions decreased with age, whereas their latency were prolonged. The over all finding obtained a significant correlation (p≤0.0001), except (latency of O3) and the (amplitude & latency of O2) they considered not significant relationship between them and the age (p>0.05). We can justify these results due to, the age that had been selected in this study, was limeted and close to each other. 

Conclusion:

     Overall findings of previous investigators indicate a significant correlation between the age and the ( amplitude - latency ) of the OPs.

   This study confirms the previous findings that the OPs amplitude is inversely related to age, whereas the OPs latency is delay related to age.

 
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