Custom Optics

Chadwick Optical Inc.

Reading Occlusion Mins lens segment is clear when viewed from the front.

Reading Occlusion Mins lens segment. Acts as frosted lens on the rear surface.

Reading Occlusion: Frosted bifocal segment only.

+14 w/ +5add S28 Bifocal. Back curve= -2.00, front is aspheric design.

+46.00 –6.00 reading Rx for the same patient using a 40 Base Curve lenticular.

Occlusion or Selective Frosting

+14 w/ +5add S28 Bifocal. Back curve

= -2.00, front is aspheric design.

High Powers

OD +4.25 –4.00 OS +3.50 –5.75

+12 add round bifocal transitions.

+23.00 –6.00 A 1.71 index is used for this monocular patient. A super modular aspheric design flattens the base curve and thins the Rx lens. A high base photochromic medical filter is used in the Rx-able clip-on over the distance Rx which stops the filter clip-on le (527VT) from rubbing the front surface of the Rx lens.

Franklin Designs

Transitions Executive bifocal with +6.00 add comprised of 4 lenses (2 each eye) spliced and bonded at bifocal line.

The lens on the right is a bifocal spliced with a 20Δ prism, base out, for hemianopic field enhancement. The lens on the left is a single vision at distance spliced with a “Mins” (frosted lens) at near. Mins lens at near allows patient to read monocularly as she cannot fuse near point images binocularly. The Mins does not appear frosted to the casual observer.

3 piece laminate creating 40Δ sector prism. Plano carrier, 10Δ on front and 30Δ on back.

2 piece laminate 12Δ base in with +20 add and 550 filter, photochromic.

Custom Optics

Laminates

Aniseikonics - Meridional-size lenses

OD -4.00-1.00 2ΔDN 2BC 1.7 thick

OS -6.00-0.25 7BC 5.0 thick

1.67 Index Varilux Comfort

OD +2.50 –4.00 10BC Trivex 7.5 Thick

OS +10.00-4.00 6BC 1.67 Index 7.0 Thick

Transitions Grey Round 35 +4.50 add

The following 4 pictures are 2 sets of glasses (distance and reading) for the same patient.

Popular lens shapes

Hemianopic vision is often accompanied by diplopia. The Peli Lens™ (left) for hemianopia is paired with a selectively frosted lens to eliminate double vision, but allows maximum peripheral view.