Japanese market

Please note that these products are a description of those available for purchase in the Japanese market.

New type of near to intermediate-distance custom made lens for indoor use that ensures a smooth indoor field of vision with a sense of depth (long distance).

＜Non-linear Progressive Power Change＞
that achieves a wide field of vision with depth at the same time as ensuring a near-distance field of vision

*The photograph is an image that shows differences in fields of vision. See the content of design below for a more detailed description of the design.

Comparison of depths



① Area of clear vision 2 mm above the fitting point
② Area of clear vision above the fitting point
③ Area of clear vision of single vision lens
*Although both IndoorLD and Roomiest are lenses for near to intermediate distances, the respective field of vision depths differ.

＜Non-linear Progressive Power Change＞　for a wide field of vision with depth

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The newly-developed "Non-linear Progressive Power Change" enables expansion of the field of vision at the fitting point (*) periphery.
The Non-linear Progressive Power Change enables long-distance vision 1.5 times greater than that of the previous indoor lens "Roomiest" and a field of vision at least 10% wider.

＜Aspheric Adjustments according to Dioptric Power＞
for comfortable vision for any power

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Previous lens

With ordinary progressive lenses, a common semi-finished blank (*) is used at each base curve division, resulting in differences in optical performance.

*Semi-finished lens material with shaping on one side completed, leaving the other side to be processed when an order is placed.

Back-surface progressive + Back-surface Aspheric design

IndoorLD provides a wider field of vision and comfortable fit to customers needing all kinds of power with no difference in optical performance caused by power.

＜Flexible Inset Adjustment＞
for a wide near-distance field of vision that factors in line of vision movement

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＜Curve Pairing system＞
for attractive pair lens appearance and outstanding optical performance

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Significant differences in the powers of the right and left lenses produce differences in the base curves, adversely affecting appearance.
In cases where there is a significant difference between the base curves, the curves of IndoorLD are automatically matched to adjust the appearance at the same time as realizing outstanding optical performance.

＜Flexible Prism Thinning＞　for optimum pair lens thickness

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Flexible prism processing is carried out to achieve greater thinness and lightness of spherically processed lens.
The prism quantity of IndoorLD is set separately for each added power with the balance between appearance and optical performance taken into consideration and, in addition, the prismatic quantities of the left and right lenses are automatically matched. In this case, the prismatic volume is matched to the smaller value.

Thin, lightweight and comfortable to wear

*This is an image of S-6.00. SEIKO's previous lens used 1.50 monomer.

The numerical value that indicates the ability of the lens material to refract light is called the "refractive index" and the higher this index, the thinner the lens. IndoorLD features a lineup of 2 types of material: Ultra-high 1.74 refractive index material and 1.60 material. In addition, back surface aspheric design is used to achieve a thin lens. The synergy between material and design enables a lens that is thinner and lighter than previous lenses.

Adopted technologies

Refractive Index (Thinness)

Our glass lenses are all plastic lenses.
The more material with a large refractive index is used, the more it is possible to have a thinner finish in lenses of the same power.

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UV-cut Coating

Sunlight contains ultraviolet rays such as UV-A waves that are known to tan the skin and form blemishes on the skin or cause skin to sag and UV-B waves that are believed to cause skin aging and form skin blemishes or freckles. Lenses furnished with a function to cut out these harmful ultraviolet rays are called "UV-cut lenses."

Seiko’s UV-cut process results in the elimination of more or less 100% of ultraviolet rays of 400 nm or less.

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Bright, Clear Anti-reflective Coating

Prevents light reflection to give bright, clear vision

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Scratch-resistant Coating for Prevention of Lens Damage

This is a process that improves the resistance of plastic lenses to scratches, the greatest drawback of this type of lens. Normally, all SEIKO lenses are provided with a coating for protection against scratches as standard.

"Super-Resistant-Coat" provides the ultimate protection against damage.

Product Names
Super Anti Reflection coating (Ordinary coating)
Super Hydrophobic coat
Super-Resistant-Coat

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Grime-resistant Coating

The grime-resistant coating is a new high-quality coating that realizes enhanced lens surface water-repelling and oil-repelling performance.
This groundbreaking coating features a remarkable improvement in the contact angle between the lens surface and the attached matter, demonstrating the ability to quickly repel substances such as water and oil. In addition, compared to older products, the coefficient of friction on the lens surface is 60% lower, making it possible to easily wipe off grime that contributes to lens fogginess such as sebum, fingerprints and substances that become attached while performing housework, including for example, oil film and cosmetics.

A grime-resistant coating makes it so much easier to care for spectacles and greatly enhances usability.

Product Names
Super-Resistant-Coat
Super Hydrophobic coat
SEIKO、STARVISION / Super Clean Coat (SCC)
PENTAX / Keep Clear Coat (KCC)

Super-Resistant-Coat, Super Hydrophobic coat, Fogless coat, Super Clean Coat (SCC) and Keep Clear Coat (KCC) cannot be ordered together.

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Shock-resistant Reinforced Coating

Up to the present, spectacle lens safety has been based on the widely-known American FDA (Food and Drug Administration) standards. Combining its cutting-edge technologies, SEIKO has developed a shock-resistant coating that achieves a degree of shock resistance even higher than that defined in FDA standards, resulting in greatly-enhanced spectacle safety.

Product Names
SEIKO、STARVISION / High impact coat
PENTAX / PR Coat

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Anti-static Coating

Static electricity readily accumulates on ordinary plastic lenses, attracting substances such as dust and pollen. This coating features a special film (conduction film) that releases static electricity, making it difficult for substances such as dust and pollen to become attached to the lens surface.

Fixed in place 1.5 mm from dust with the concave side of the lens facing downward. Dust attached to the convex side photographed after rubbing the concave side back and forth 20 times. (Dust shown in the photograph: Produced by scraping Styrofoam)

Product Name
Super-Resistant-Coat

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Anti-fogging Coating

The anti-fogging coating is a new type of coating that prevents lenses from fogging when exposed to changes in temperature as the wearer moves from one location to another.
Powerful anti-fogging effects and high sustainability can be realized by carrying out simple, regular maintenance by coating the coating film that features high hydrophilicity with maintenance cleaner with an even greater degree of hydrophilicity.

Product Name
Fogless coat

*Fogless coat cannot be ordered together with Super Hydrophobic coat, Super Clean Coat(SCC) or Keep Clear Coat(KCC).

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Reducing blue light

By reflecting and reducing the short wavelengths (blue light) that cause glare and flickering are reduced with an improvement in visibility

Product Name
Super-Resistant-Coat-BR

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Product Name Thinness UV Cut off Reflection Resistance Scratch Resistance Contamination Resistance Shock Resistance Anti-static Resistance Fogging Resistance Reducing blue light
IndoorLD 1.67 ★★★★ ◎ ◎ ◎ ◎ option option option option
IndoorLD 1.60 ★★★ ◎ ◎ ◎ ◎ option option option option

Product Name Refractive Index Specific Gravity Abbe Value Progressive Power Corridor (mm) Quality Assurance Mark
IndoorLD 1.67 1.67 1.36 32 23
IndoorLD 1.60 1.60 1.30 42 23

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