More and more presbyopes today wear contact lenses. SEED has been striving to meet their demands for good vision at all visual distances, for every occasion, and in every environment. Working jointly with the Brien Holden Vision Institute, a world-renowned research institution, SEED has sought to develop innovative contact lenses for presbyopia. Designed and developed based on a unique theory, the SEED 1dayPure EDOF provides comfortable contact lens wear, for all age presbyopes.
Simulated Images of Visual Performance
SEED 1dayPure EDOF
Extended depth-of-focus provides stable visual performance over a wide range of visual distances, from near to far.
- Refractive cylinder ≤ 1.00D
- Do not have excessive demands and expectations on vision
Presbyopes who might not achieve successful contact lens wear
- Critical or very fine visual demands at both distance and near
- Refractive cylinder > 1.00D (any axis) in one or both eyes
- Monocular distance VA poorer than 6/12 with spherical equivalent refractive correction
- Pupil size < 2.5 mm in mesopic conditions (e.g., standard clinic room illumination)
- Abnormal binocular sensory function (e.g., amblyopia or strabismus)
- In expectation of discarding and never again using spectacles, even for special tasks or viewing conditions
INNOVATIVE CONTACT LENS FOR PRESBYOPIA
*Illustration of lens design
EDOF LENS DESIGN
The Brien Holden Vision Institute and SEED have developed and commercialized an algorithm that unlocks the full potential of optical characteristics (lens performance) and visual properties (visual acuity for users). Applying this special algorithm to lens design, we have developed a unique EDOF lens that minimizes variability in visual performance at varying visual distances, the major limitation of conventional bifocal contact lenses. The EDOF lens also provides good perceived image quality under a broad range of conditions.
SHORTCOMINGS OF CONVENTIONAL BIFOCAL CONTACT LENSES
Factors such as varying visual distances and changing pupil size can affect the stability of visual performance of conventional bifocal contact lenses.
How can we create lenses that provide stable visual performance under a broad range of visual conditions?
「SEED 1dayPure EDOF」
Good Vision at All Visual Distances
Extended Depth Of Focus
Depth of focus refers to the range of distances over which one perceives images to be in satisfactory focus.
Extended depth-of-focus lenses provide good perceived image quality at all distances throughout the range of depth of focus.
An illustration of EDOF
(SEED 1dayPure EDOF)
Extended depth of focus (EDOF) allows lens users to perceive images to be continuously in focus over a wide range of visual distances, from near to far.
●Single vision lens
A single vision lens has a single focal point for optimal focus. Lens users also perceive images to be in focus around this focal point (depth of focus).
A bifocal lens has two focal points for optimal focus. Lens users perceive focused images at each focal point and within their depths of focus, while images at intermediate distances are perceived as out of focus.
With a design based on the EDOF theory, the SEED 1dayPure EDOF contact lens provides good perceived image quality at all distances throughout the range of depth of focus.
Three Lens Designs for Three Different Depth-of-Focus Ranges
To meet patient’s extensive needs, we provide three lens designs for three different depth-of-focus ranges. Each lens design features an extended depth of focus and provides the power distribution needed to minimize perceived image quality deterioration.
Illustrations of power distribution
While a lens of the high depth-of-focus type offers the widest range of depth of focus, perceived image quality is best with the low depth-of-focus type.
■Natural Polymer “Alginic Acid”
Contact lens storage solution is infused with alginic acid which is a natural moisturizing agent extracted from seaweed. It attracts moisture in eyes, and keeps tears on the surface of the lenses.
■Zwitterionic material “SIB”
SEED’s original material “SIB” (SEED Ionic Bond) which contains both positive and negative ions resulting in electrical stability. This stability ensures high water content while keeping out dust and impurities.
“EL” or “EM” or “EH” either 1 mark is printed to help users distinguish between the inside and outside faces of the lens, 1 marker can be found on every lens to ensure the easy handling and safe usage of SEED 1dayPure EDOF.
TWO EXTRA LENSES IN EVERY BOX
SEED 1dayPure EDOF has 32 pieces of lenses in one box. Even with extra 2 pieces of lenses, SEED’s packaging is just as compact as other boxes containing 30 pieces of lenses.
USER -FRIENDLY DESIGN : CROSS-UNIT CASE
For ease of usage, SEED has introduced the following designs for the convenience of its patients. Our Cross Unit Cases allow capsules for the left and right lenses to be joined together for easier packaging.
FINGERTIP CLOSURE MECHANISM
The wearer can open the package easily and close it at the touch of a finger. This eliminates the need for hand contact and is a more hygienic way of handling the box.
HIGH PERFORMANCE AND ECO-FRIENDLY FACILITY
All the manufacturing processes of “SEED 1dayPure EDOF” are strictly managed at SEED Kounosu laboratory. Great care is taken in producing each pair of SEED contact lens at the manufacturing plant in order to ensure the utmost safety for human eyes. SEED also takes its environmental responsibility seriously and ensure its facilities to be eco-friendly.
HIGH STANDARD OF INSPECTION PROCESS AND QUALITY MANAGEMENT SYSTEM
To ensure the quality of the product, we are shipping only strictly selected products under a strict quality management system and thorough inspection.
Furthermore, using two-dimensional code and ID tag, we are implementing integrated management of production and distribution. It also enables all of the lenses to be traceable.
In addition, we have obtained the certification of ISO13485, which is the international standard of quality management systems for medical devices. This has further strengthened our quality control system.
Acquired ISO13485 certification in 2011 at Clinical Affairs Department & Device Developments Department Kounosu Laboratory
|Modality||Daily disposable contact lens|
|FDA Group||Group IV|
|Lens Material||2-HEMA, negative, positive monomer, MMA, EGDMA|
|Oxygen Permeability (Dk)||30.0×10-11(cm2/sec) ● (mLO2/(mL×mmHg))|
|Oxygen Transmittance (Dk/L)||42.9×10-9(cm2/sec) ● (mLO2/(mL×mmHg)) (-3.00D)|
|Center Thickness||0.07mm (-3.00D)|
|Lens Marking||[Low: “EL” ] [Middle: “EM”] [High: “EH”]|
|Power||+5.00D ~ -12.00D(0.25D step)|
|Extended Depth of Focus (EDOF)||Low(Low Depth of Focus )|
|Middle(Middle Depth of Focus )|
|High(High Depth of Focus )|
|Volume Per Box||32 lenses in one box|
|MDA Registration No||GB885312043922|