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Blinking Eyes Often While Watching TV/Seeing Phone?

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CThong (F/15) came for eye examination, with complaint of blurry seeing whiteboard at school. Near vision is fine.

Vision without glasses
R: 6/6-
L: 6/6-

Existing glasses
R: PL/-0.75×180 (6/6)
L: +0.25/-0.75×180 (6/6)

Subjective Refraction
R: +0.25/-0.25×180 (6/6) (+1.00 blur lens test: 6/12)
L: +0.25/-0.25×180 (6/6) (+1.00 blur lens test: 6/12)
Add: +0.50

Other assessments show:

Cover Test
Distance: NMD
Near: NMD

Howell Card
Distance: 1 EP
Near: 0 – 2 XP
+1.00 Near: 6 – 8 XP
-1.00 Near: 4 XP
+2.00 Near: 4 XP
-2.00 Near: 2 XP

(when blur reported, alternate occlusion: RE sees clear, LE sees blurry)

(when blur reported, alternate occlusion: RE sees clear, LE sees blurry)

8/10cm, 8/10cm, 8/10cm, 8/14cm, 8/14cm, 8/14cm

R: 13.5D, 11.5D, 10D (blur @end of RAF rule, clear @30cm)
L: 11.5D, 10D, 8.5D (blur @end of RAF rule, clear @30cm)

NPC (with Add +0.75)
8/12cm, 8/12cm, 12/16cm, 12/16cm

R: +1.00
L: +1.00

Fusional Reserves
Near, NFV: 2/12/10
Near, PFV: x/6/2
Distance, NFV: 6/8/6
Distance, PFV: 8/14/10

Vergence Facility
Near: 3 cpm (double BI, double did not get closer with blink)
Distance: 0 cpm (double BO, double did not get closer with blink)

Fusional Reserves (with 1BI OU)
Near, PFV: x/6/2

Interpupillary distance, IPD = 6.0cm

We ask CThong whether or not her near vision will be blurry/lose focus after some time, she said yes.. in which she will blink3 her eyes. Her mother also reported noticing her blinking her eyes often watching TV/phone.

CI + AI?


Vision without glasses
6/6 – smallest testing line
6/7.5 – 2nd smallest line
6/9 – 3rd smallest line
6/12 – 4th smallest line
6/15 – 5th
6/18 – 6th
6/21 – 7th
6/24 – 8th

Examination of Eye Alignment
Cover Test, CT @ Distance & Near
– NMD(No Movement Detected) or
– small XP, fast recovery
EP = Esophoria is misalignment of eye, eye is deviated inwards
XP = Exophoria is misalignment of eye, eye is deviated outwards

Examination of Eye Posture
(Howell Card) by 6^ BD OD
– 0-3 XP (blue part) or
– 0-1 EP (yellow part)
– 0-6 XP (blue part)

Accommodation/Focusing analysis – ability to relax
+1.50 to +2.50

Accommodation/Focusing analysis – ability to focus
-1.37 to -3.37

Convergence, NPC – ability of eye to maintain a single clear near image (RAF rule)
Break/Recovery – within 10cm or TTN(to the nose)

AA(Amplitude Accommodation) – eye stamina (Dioptre, D) (RAF rule)
6yo – 16.5D | 6cm
9yo – 15.5D | 6.5cm
12yo – 14.5D | 7cm
15yo – 13.5D | 7.5cm
18yo – 12.5D | 8cm
21yo – 11.5D | 9cm
24yo – 10.5D | 10cm
27yo – 9.5D | 11cm
30yo – 8.5D | 12cm

MEM(Monocular Estimation Method) – measure accommodation response seeing near target
+0.25 to +0.75 (with movement)

Accommodation Facility – ability to change focus: far to near or near to far) by Flipper +/- 2.00
Monocular: 6cpm – 16cpm
Binocular: 4cpm – 14cpm
(1 cycle per minute, cpm = 2 words)

Fusional Reserves 
Convergent/Divergent reserve stamina (Prism Bar)
Children 7-12yo
Near, PFV: x/15-31/10-22
Near, NFV: x/7-17/3-11
Near, PFV: x/10-28/7-21
Near, NFV: x/7-19/5-15
Distance, PFV: x/4-18/5-9
Distance, NFV: x/4-10/2-6

Vergence Facility  – ability to make rapid repetitive vergence changes (Prism Flipper 12BO & 3BI)
Distance: 12-18 cpm
Near: 12-18 cpm)
(1 cycle = 2 times clearing target)

Random Dot 3S  – 3D Vision