UO Libraries
Fitting Guides > CELL System

Fitting Guides

CAD Thin Lens | CELL System
Platinum Eye | Golden Eye | Essential | Essential Xtra
Buckley | Tangent Streak
I Kone | Valley Kone | Rose K

CELL System ™
(Controlled Edge Lift Lens)
Fitting Guide

  • The most comfortable, easiest to fit, GP lens design.

  • The C.E.L.L. System™ lens has a spherical optic zone with a smooth, junctionless aspheric periphery.

  • The aspheric periphery is identified by an axial edge lift and .12 is the most common.

  • Recommended in Boston ES, EO and XO.

All-New GP Comfort

Your patients will love the comfort of the smooth periphery GP lenses created by our computerized lathe. With this revolutionary, sophisticated equipment, we can cut exact, junctionless curves. Valley Contax is the leader in this advanced technology.

Easy-fit, Redefined

With the CELL™ (Controlled Edge Lift Lens) System, the .12 edge lift will fit 80% of your patients, and our alternate sizes .10 and ,14 will cover nearly everyone else.

Lens Design

The CELL™ System gives you a spherical optic zone, tapering into an aspheric periphery. The final result is an ultra thin lens, which feels great, works effectively, fits properly and virtually eliminates 3-9 staining.

Lens Material

We recommend the CELL System manufactured in Boston ES, EO and EO. Or specify the material of your choice and we’ll give it the CELL™ System touch. Satisfaction guaranteed.

Growing Your GP Practice

It really is as simple as enlightening your patients on the benefits of the CELL™ System and satisfying them with GP lenses from Valley Contax.

The CELL™ System (Controlled Edge Lift Lens) is available exclusively from Valley Contax in a wide range of parameters:

Base Curves: Any base curve radius

Powers: Made to order

Diameters suggested sizes: 9.0 9.3 9.6

Edge Lift:
.10 axial edge lift
.12 axial edge lift (most common)
.14 axial edge lift


Parameter Selection
 
1. Select lens diameter based on flattest "K" and the horizontal visible iris diameter.

Visible Iris Diameter Diameter
Less than 11.3 mm 9.0
11.3 to 11.8 mm 9.3
Greater than 11.8 mm 9.6


Flattest K Diameter
47.00D 9.0
46.75D 9.0
46.50D 9.0
46.25D 9.0
46.00D 9.0
45.75D 9.0
45.50D 9.0
45.25D 9.0
45.00D 9.0
44.75D 9.3
44.50D 9.3
44.25D 9.3
44.00D 9.3
43.75D 9.3
43.50D 9.3
43.25D 9.3
43.00D 9.3
42.75D 9.6
42.50D 9.3
42.25D 9.3
42.00D 9.3
41.75D 9.3
41.50D 9.3
41.25D 9.3
41.00D 9.3
40.75D 9.3
40.50D 9.3
40.25D 9.3
40.00D 9.3

2. Select base curve based on flattest "K" and amount of corneal astigmatism.

Flattest K 47.00D
Corneal Astigmatism
0.00 to 0.50D 0.75 to 1.50D 1.75 to 2.50D
 
47.00D 46.75/7.21 47.00/7.18 47.25/7.45
       
46.75D 46.50/7.25 46.75/7.21 47.00/7.18
46.50D 46.25/7.29 46.50/7.25 46.75/7.21
46.25D 46.00/7.33 46.25/7.29 46.50/7.25
46.00D 45.75/7.37 46.00/7.33 46.25/7.29
45.75D 45.50/7.41 45.75/7.37 46.00/7.33
45.50D 45.25/7.45 45.50/7.41 45.75/7.37
45.25D 45.00/7.50 45.25/7.45 45.50/7.41
45.00D 44.75/7.54 45.00/7.50 45.25/7.45
44.75D 44.25/7.62 44.50/7.58 44.75/7.54
44.50D 44.00/7.67 44.25/7.62 44.50/7.58
44.25D 43.75/7.71 44.00/7.67 44.25/7.62
44.00D 43.50/7.75 43.75/7.71 44.00/7.67
43.75D 43.25/7.80 43.50/7.75 43.75/7.71
43.50D 43.00/7.84 43.25/7.80 43.50/7.75
43.25D 42.75/7.89 43.00/7.84 43.25/7.80
43.00D 42.50/7.94 42.75/7.89 43.00/7.84
42.75D 42.00/8.03 42.25/7.98 42.50/7.94
42.50D 41.75/8.08 42.00/8.03 42.25/7.98
42.25D 41.50/8.13 41.75/8.08 42.00/8.03
42.00D 41.25/8.18 41.50/8.13 41.75/8.08
41.75D 41.00/8.23 41.25/8.18 41.50/8.13
41.50D 40.75/8.28 41.00/8.23 41.25/8.18
41.25D 40.50/8.33 40.75/8.28 41.00/8.23
41.00D 40.25/8.38 40.50/8.33 40.75/8.28
40.75D 40.00/8.43 40.25/8.38 40.50/8.33
40.50D 39.75/8.49 40.00/8.43 40.25/8.38
40.25D 39.50/8.54 39.75/8.49 40.00/8.43
40.00D 39.25/8.59 39.50/8.54 39.75/8.49

3. Select controlled edge lift.

39.25/8.59 to 43.25/7.80 Select .10 a.e.l
43.50/7.75 to 47.25/7.15 Select .12 a.e.l

4. The center thickness.
  The center thickness of the C.E.L.L.™ design is approximately .03mm thinner than a standard GP lens design. All lenses are lenticularized to control edge thickness and geometry. These features work in tandem to optimize on-eye lens performance and patient comfort.


Lens Fitting
 
1. The first trial lens based on the selected parameters is placed on the patient's eye and allowed to equilibrate for 10 minutes.
2. The base curve should be adjusted steeper of flatter until an alignment fluorescein pattern is noted centrally across the flat corneal meridian , (horizontal, 180 degrees meridan, in the case of with-the rule astigmatism). This lens should demonstrate a slight area of fluorescein thinning (near touch) at the edge of the posterior optical zone along the flat meridian.
3. The lens should move approximately 1 to 3mm with the blink and retain a slightly superior or central resting position.

Problem solving techniques
 
1. Excessive lens movement or frequent nasal or temporal dislocation is characteristic of a flat fitting relationship.
2. Restricted vertical movement or a low resting lens position is indicative of a steep fitting relationship.
3. The ideal edge lift of the C.E.L.L.™ design should exhibit peripheral clearance when the lens is resting in its primary position. The patient is then directed to move their gaze. If the .12 (normal) edge lift of the lens exhibits significant peripheral impingement (in an position of gaze) the flatter .14 edge lift should be ordered. If the .12 lens exhibits excessive clearance in the various positions of gaze, or if the patient experiences excessive symptoms of lens awareness, the steeper .10 edge lift should be ordered.


Steve
President

"Valley Contax feels proud to be one of the select laboratories who have earned this prestigious award..."

"...as a reflection of the importance we place on quality."

Sign Up to receive our monthly newsletter -
New Happenings