RGP Flashcards
STATIC FITTING ASSESSMENT TECHNIQUES
CENTRAL ZONE
MP ZONE
PERIPHERAL ZONE
CONTACT/CLEARANCE
HORIZONTAL AND VERTICAL MERIDIANS
STATIC FITTING ASSESSMENT CENTRAL
POOLING-STEEP
ALIGNMENT
TOUCH-FLAT
WIDTH OF POOLING OR TOUCH ZONE
STATIC FITTING ASSESMENT MP
CONTACT - LIGHT, MEDIUM, HEAVY
ALIGNMENT
FLUORESCEIN BAND
RESPONSE CRITERIA
RGP LENSES SHOULD PROVIDE
GOOD VA
COMFORT
NO OCULAR INSULT
NORMAL FACIAL APPEARANCE (POSTURE)
STATIC FITTING: OPTIMA;
MINIMAL CENTRAL CLEARANCE
LIGHT MP CONTACT ZONE
OPTIMAL EDGE WIDTH
AVERAGE EDGE CLEARANCE
OPTIMAL FITING: DYNAMIC
CENTERED (+/- 0.5mm)
STABLE
SUPERIOR LID COVERAGE
MOVEMENT 0 SMOOTH, VERTICAL, AVE SPED, 1-2MM
STATIC FIT: TIGHT
EXCESSIVE CENTRAL CLEARANCE
HEAVY MP CONTACT ZONE
NARROW EDGE WIDTH
REDUCED EDGE CLEARANCE
DYNAMIC FIT: TIGHT
CENTRED
STABLE
SUPERIOR LID COVERAGE
MOVEMENT: ROCKY/SMOOTH, VERTICAL, FAST SPEED, <1 MM
STATIC FIT: LOOSE
DECENTRED
HIGH/LOW RIDING
UNSTABLE
DYNAMIC FIT: LOOSE
APICAL ROTATION
LID ATTACHEMENT
VARIABLE SPEED
>2.0 MM
STATIC FITTING ASSESSMENT TECHNIQUEQ
CENTRAL ZONE
MP Z
PERIPHERAL Z
CONTACT/CLEARANCE
HORIZONTAL AND VERTICAL MERIDIANS
ESSENTIAL IN RGP FITTING
WHAT?
INSTRUMENT
DEVICE
OTHERS
ESSENTIAL IN RGP FITTING
WHO?
PX SELECTION:
MOTIVATION AND EXPECTATION
OPTICAL CONSIDERATION
GENERAL HEAKTH
OCULAR HEALTH
CL HX
ESSENTIAL IN RGP FITTING
WHY?
CRITICAL VISION NEED (HIGH EOR)
SIGNIFICANT ASTIGMATIC CORRECTION
SOFT LENS FAILURE
IRREGULAR CORNEA
SLOW DOWN MYOPIC PROGRESSION
ESSENTIAL IN RGP FITTING
HOW?
OCULAR MEASUREMENTS:
HVID
PALPEBRAL FISSURE SIZE
PUPIL SIZE
K READING
LID AND CORNEA
SPECTACLE REFRACTION
LENS DESIGN AND OPTICS
LENS PARAMETERS
LD
OZD
LP
BC
SECONDARY CURVE WIDTH
SC RADIUS
LENS DESIGN AND OPTICS
FITTING ASSESSMENT
LENS CENTRATION
LENS MOVEMENT
LENS COMFORT
CLARITY OF VISION
FLUORESCEIN PATTERN
FITTING ASSESSMENT
HOW THE BACK SURFACE OF THE LENS ALIGN TO THE CORNEA
STATIC
LENS DESIGN AND OPTICS
HOW THE LENS CENTERS AND MOVES ON THE EYE
DYNAMIC
CHARACTERISTICS OF ALIGNMENT
CENTRATION: GOOD
VA: CRISP AND STABLE
LENS MOVEMENT: MODERATE (1.0-1.5mm VERTICALLY)
LENS COMFORT: /
POSITION: LENS REMAINS ON THE CORNEA IN ALL POSITIONS OF GAZE
FLUORESCEIN: DIFFUSED
CHAR OF FLAT FIT
FLUORESCEIN: CENTRAL DARKER AREA OF APICAL TOUCH
MOVEMENT: EXCESSIVE ON BLINK
COMFORT: POOR
EXCESSIVE TEARING EVEN AFTER ADAPTATION PERIOD
TEAR LENS FORMED: NEGATIVE
POSITION: DECENTERED
CHAR OF STEEP FIT
FLUORESCEIN: CENTRAL GREEN POOLING BENEATH THE LENS; MAY ALSO INCLUDE TRAPPED AIR BUBBLES UNDER THE LENS
MINIMAL LENS EDGE CLEARANCE
MOVEMENT: INSUFFICIENT
COMFORT: MINIMAL LID SENSATION REPORTED BY THE PX
TEAR LENS FORMED: POSITIVE
