Semi Finished Lens
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SETO 1.499 Semi Finished Single Visin Lens
CR-39 lenses use the true value of imported CR-39 monomer, the longest history of resin material and the most widely sold lens in middle level country. Lenses with different dioptric powers can be made from one semi-finished lens. The curvature of the front and back surfaces indicates whether the lens will have a plus or minus power.
Tags: 1.499 resin lens,1.499 semi-finished lens
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SETO 1.499 Semi Finished Round top bifocal lens
Bifocal lens can be called a multi purpose lens. It has 2 different fields of vision in one visible lens. The larger of the lens usually has the prescription necessary for you to see for distance. However, this can also be your prescription for computer use or intermediate range, as you would normally be looking straight when you view through this particular part of the lens.The lower part, also called the window, typically has your reading prescription. Since you generally look down to read, this is the logical place to put this range of vision assistance.
Tags:1.499 Bifocal lens,1.499 round top lens,1.499 semi-finished lens
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SETO1.499 Semi Finished Flat Top Bifocal Lens
Flat-top lens is a very convenient type of lens that allows the wearer to focus on objects both at close range and far range through a single lens.This type of lens is designed to enable viewing of objects in the distance, at close range and in the intermediate distance with corresponding changes in power for each distance.CR-39 lenses use the imported CR-39 raw monomer, which is one of the longest history of resin materials and the most widely sold lens in middle level country.
Tags: 1.499 resin lens,1.499 semi-finished lens,1.499 flat-top lens
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SETO 1.56 Semi-Finished Blue Block Single Vision Lens
Blue Cut Lens is to block and protect your eyes from high energy blue light exposure. Blue cut lens effectively blocks 100% UV and 40% of the blue light, reduces the incidence of retinopathy and provides improved visual performance and eye protection, allowing wearers to enjoy the added benefit of clearer and sharper vision, without altering or distorting color perception.
Tags: Blue blocker lenses, Anti-blue ray lenses, Blue cut glasses, 1.56 semi-finished lens
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SETO 1.56 Semi-Finished Photochromic Lens
The molecules responsible for causing photochromic lenses to darken are activated by the sun’s ultraviolet radiation. Because UV rays penetrate clouds, photochromic lenses will darken on overcast days as well as sunny days.Photochromic lenses typically will not darken inside a vehicle because the windshield glass blocks most UV rays. Recent advancements in technology allow some photochromic lenses to activate with both UV and visible light, providing some darkening behind the windshield.
Semi-finished lens is the raw blank used to produce the most individualized RX lens according to thepatient’s prescription. Different prescription powers request for different semi-finished lens types or base curves.
Tags: 1.56 resin lens,1.56 semi-finished lens,1.56 photochromic lens
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SETO 1.56 Semi-Finished Progressive Lens
Progressive lenses are line-free multifocals that have a seamless progression of added magnifying power for intermediate and near vision.The starting point for freeform production is a semi-finished lens, also known as a puck due to its resemblance to an ice hockey puck. These are produced in a casting process that is also used to manufacture stock lenses. The semi-finished lenses are produced in a casting process. Here, liquid monomers are first poured into moulds. Various substances are added to the monomers, e.g. initiators and UV absorbers. The initiator triggers a chemical reaction that leads to hardening or “curing” of the lens, while the UV absorber increases the UV absorption of the lenses and prevents yellowing.
Tags: 1.56 progessive lens,1.56 semi-finished lens
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SETO 1.56 Semi-Finished Flat Top Bifocal Lens
Flat-top lenses were used to correct two different eye prescriptions. Bifocals were easy to spot – they had a line dividing the lens in two, with the upper half for distance vision, and the lower half for reading. The semi-finished lenses are produced in a casting process. Here, liquid monomers are first poured into moulds. Various substances are added to the monomers, e.g. initiators and UV absorbers. The initiator triggers a chemical reaction that leads to hardening or “curing” of the lens, while the UV absorber increases the UV absorption of the lenses and prevents yellowing.
Tags: 1.56 resin lens,1.56 semi-finished lens,1.56 flat-top lens
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SETO 1.56 Semi-Finished Round Top Bifocal Lens
Semi-finished lenses need to have high qualified rate in power accurancy, stability and cosmetics quality. High optical features, good tinting effects and hard-coating/AR coating results, realizing the maximum production capacity are also available for a good semi-finished lens. Semi finished lenses can reprocessing to RX production, and as semi-finished lenses, not just superficial quality, they are more focus on the internal quality, such as precise and stable parameters, especially for the popular freeform lens.
Tags: 1.56 resin lens,1.56 semi-finished lens,1.56 round-top lens
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SETO 1.56 single vision Semi-finished Lens
The importance of a good semi-finished lens:
1. Semi-finished lenses need to have high qualified rate in power accurancy, stability and cosmetics quality.
2. High optical features, good tinting effects and hard-coating/AR coating results, realizing the maximum production capacity are also available for a good semi-finished lens.
3. Semi finished lenses can reprocessing to RX production, and as semi-finished lenses, not just superficial quality, they are more focus on the internal quality, such as precise and stable parameters, especially for the popular freeform lens.
Tags: 1.56 resin lens,1.56 semi-finished lens
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SETO 1.60 Semi-Finished Single Vision Lens
The starting point for freeform production is a semi-finished lens, also known as a puck due to its resemblance to an ice hockey puck. These are produced in a casting process that is also used to manufacture stock lenses. The semi-finished lenses are produced in a casting process. Here, liquid monomers are first poured into moulds. Various substances are added to the monomers, e.g. initiators and UV absorbers. The initiator triggers a chemical reaction that leads to hardening or “curing” of the lens, while the UV absorber increases the UV absorption of the lenses and prevents yellowing.
Tags: 1.60 resin lens,1.60 semi-finished lens，1.60 single vision lens