CCOG for OMT 282 Winter 2025


Course Number:
OMT 282
Course Title:
Diagnostic Procedures II
Credit Hours:
3
Lecture Hours:
20
Lecture/Lab Hours:
0
Lab Hours:
30

Course Description

Presents the principles of advanced visual field examination with emphasis on Goldmann Perimetry. Covers the principles and techniques of exophthalmometry, color and function tests, ocular motility and echography. Focuses on skill development and increasing speed and accuracy. Prepares for employment opportunities in the ophthalmic setting. Prerequisites: OMT 272, and admission to the OMT Program or Program Director approval. Audit available.

Intended Outcomes for the course

Upon successful completion of the course students should be able to:

  1. Demonstrate manual perimetry in the clinical setting.

  2. Measure axial length of the eye and calculate intraocular lenses' power in preparation for surgery.

  3. Demonstrate a variety of ancillary diagnostic tests in the clinical setting including color vision and tear function tests.

Aspirational Goals

  1. Collect information and create a cover letter and resume to use for a job search.

  2. Practice interviewing skills in-person and online with video-streaming technology for use when seeking employment in the field.

Outcome Assessment Strategies

At the beginning of the course, the instructor will detail the methods used to evaluate student progress and the criteria for assigning a course grade. The methods may include one or more of the following tools: examinations, quizzes, homework assignments, research papers, laboratory modules and student participation.

Course Content (Themes, Concepts, Issues and Skills)

ADVANCED VISUAL FIELDS

  • Name and describe the anatomical structures of the visual pathway

  • Define coordinates of the visual field, including radial meridians and circles of eccentricity

  • Discuss the island of vision analogy

  • Define foot-candle

  • Define visual field terminology including:  isopters, threshold, suprathreshold, apostilb, decibel

  • Define depression, general defect, and focal defect of the visual field

  • Define quadrant, sector, hemi, altitudinal, bitemporal, nasal step, homonymous, congruous, incongruous, ipsilateral, and contralateral as they apply to depressions of the visual field

  • Define scotoma and list the 5 criteria for exploring scotoma of the visual field

  • Define central, pericentral, paracentral, cecal, centro-cecal as they apply to scotomas of the visual field

  • List the sequence of the visual pathway from the retina to the visual cortex in correct order

  • Relate visual field loss to specific ocular dysfunction/pathology

  • Calibrate the Goldmann perimeter

  • Perform a Goldmann visual field examination with emphasis on correct procedure for selecting stimulus and correcting lens power, plotting isopters, finding defects and investigating visual field loss

  • Describe common visual field artifacts and their causes

  • List common visual field defects from: retinal disease, optic nerve disease/glaucoma and neurological disease

MOTILITY

  • Define fusion, diplopia and suppression

  • Describe use of the Maddox rod, Worth 4-dot, red glass and Bagolini lenses in testing for fusion

  • Perform cover/uncover test, alternate cover test, Krimsky and Hirschberg tests

ECHOGRAPHY

  • List classifications of ultrasound

  • Explain terminology related to ultrasound including signal, amplitude, transducer, attenuation, reflection, gates, spikes, A-constant, and immersion

  • Describe clinical applications of diagnostic ultrasound

  • Demonstrate proper maintenance of ultrasound equipment

  • Define corneal thickness and list the steps necessary to perform corneal pachymetry

  • Define standardized echography

  • Calculate an accurate IOL lens power

  • Demonstrate proper labeling of echograms

  • State the effect of corneal power, lens power and overall length of the eye on IOL calculations

  • Distinguish contact A-scan from Immersion A-scan

  • List methods of performing diagnostic B-scans

  • List methods available to document ultrasound images

  • List steps necessary for performing Laser Interferometry axial length measurement. (IOL Master)

  • Demonstrate axial length measurements with an IOL Master

  • Define and describe wave front diagnostics

  • Compare and contrast keratometry readings to corneal topography readings

  • Corneal sensitivity testing

  • Contact lens slit lamp exam (pre and post fitting)

CORNEAL TOPOGRAPHY

  • Correctly identify the patterns of corneal topography consistent with: 

  • with the rule astigmatism

  • against the rule astigmatism

  • irregular astigmatism

  • kerataconus

  • LASIK

  • Radial Keratotomy

  • Penetrating keratoplasty

INSTRUMENT MAINTENANCE

  • Change bulbs on the lensometer, slit lamp, Goldmann Perimeter, keratometer, retinoscope, and acuity projector

  • Calibrate the Goldmann tonometer, lensometer, keratometer, IOL Master, and acuity projector


EXOPHTHALMOMETRY, COLOR VISION, TEAR FUNCTION

  • Perform measurement of proptosis using a Hertel exophthalmometer

  • Demonstrate color vision testing using Ishihara test plates

  • Demonstrate color vision testing using the D-15 test

  • Name alternate methods of color testing

  • Take a history relevant to identifying a possible "dry eye" patient

  • List the steps to perform Schirmer Tear Test I and II

  • Rose Bengal

  • Define and demonstrate a tear film "breakup time" test (BUT)

  • Corneal sensitivity testing

EMPLOYMENT PREPARATION

  • Prepare for employment in the field, by practicing interview skills and resume writing