General Conditions
  CR-39 Hard Resin Lenses
  1.56 Middle Index Hard
  Resin Lenses
  1.56 Photochromic Hard
  Resin Lenses
  1.59 Polycarbonate
  Lenses
  1.61/1.67 Hi-Index Hard
  Resin Lenses
  Mineral White 1.523
  Optical Lenses
  Mineral 1.7/1.8/1.9
  Hi-index Lenses
  Mineral Photochromic
  Lenses
  Sunlens & Polarized
  Lenses
  Coating
  Quality Control of Lenses
  Package of Lenses
 
 
 
 
 General Conditions
 
(1)
Both mineral (glass) and hard resin lenses conform to the following standards:
 
ISO8980-1-2017 Ophthalmic optics - Uncut finished spectacle lenses - Part 1: Specifications for single-vision and multifocal lenses
ISO8980-2-2017 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for progressive power lenses
ISO8980-3-2013 Ophthalmic optics - Uncut finished spectacle lenses - Part 3: Transmittance specifications and test methods
ISO8980-4-2006 Ophthalmic optics - Uncut finished spectacle lenses - Part 4: Specifications and test methods for anti-reflective coatings
ISO8980-5-2005 Ophthalmic optics - Uncut finished spectacle lenses - Part 5: Minimum requirements for spectacle lens surfaces claimed to be abrasion-resistant
ISO10322-1-2016 Ophthalmic optics - Semi-finished spectacle lens blanks - Part 1: Specifications for single-vision and multifocal lens blanks
ISO10322-2-2016 Ophthalmic optics - Semi-finished spectacle lens blanks - Part 2: Specifications for progressive power lens blanks
ISO13666-2012 Ophthalmic optics - Spectacle lenses - Vocabulary
ISO14889-2013 Ophthalmic optics - Spectacle lenses - Fundamental requirements for uncut finished lenses
ISO/TR 28980-2007 Ophthalmic optics - Spectacle lenses - Parameters affecting lens power measurement
GB10810-1-2005 Uncut finished spectacle lenses - Part 1: Single-vision and multifocal lenses
GB10810-2-2006 Uncut finished spectacle lenses - Part 2: Progressive power spectacle lenses
GB10810-3-2006 Spectacle lenses and related eyewear - Part 3: Transmittance specifications and test methods
GB10810-4-2012 Uncut finished spectacle lenses - Part 4: Specifications and test methods for anti-reflective coatings
GB10810-5-2012 Uncut finished spectacle lenses - Part 5: Requirements of abrasion-resistant for spectacle lens surfaces
GB27995-1-2011 Semi-finished spectacle lens blanks - Part 1: Specifications for single-vision and multifocal lens blanks
GB27995-2-2011 Semi-finished spectacle lens blanks - Part 2: Specifications for progressive power lens blanks
QB2682-2005 Properties and quality requirement for anti-reflection coating of spectacles lenses
QB/T2702-2005 Test method of abrasion-resistance for coating of spectacles lenses
Hard resin lenses also conform to QB/T2506-2017 Optical resin lenses standard.
 
Y&S offers a 1-year limited warranty.
(2) The quality management system of Y&S is ISO9001 (2015) and GB/T19001-2016 certified. The environmental management system of Y&S is ISO14001 (2015) and GB/T24001-2016 certified. The occupational health and safety management system of Y&S is OHSAS18001 (2007) and GB/T28001-2011 certified.
Patent Certificates
(3) Goods have been registered with FDA in the USA (Registration No. 3003691828; Firm Establishment Identifier (FEI) No. 3003691828; Owner/Operator No. 9050929; Device Listing Document No. E101962). Registrations in many other countries are also completed.
(4) Goods are approved by TUV according to CE standard (Medical Devices Directive 93/42/EEC Annex VII, TUV Report No. 15016632002).
(5) All prices of finished and semi-finished lenses offered in this Purchase Guide are in US Dollar per pair (2 pieces). Discounts are applicable for large quantity order.
(6)
Prices of finished lenses in this Purchase Guide are based on certain power groups, details are as follows.
 
Group G2 means Sph. power from 0.00 to ±2.00; -G2 means Sph. power from 0.00 to -2.00
Group G4 means Sph. power from ±2.25 to ±4.00; -G4 means Sph. power from -2.25 to -4.00
Group G6 means Sph. power from ±4.25 to ±6.00; -G6 means Sph. power from -4.25 to -6.00
Group G2.2 means Sph. power from 0.00 to ±2.00 and Cyl. power from ±0.25 to ±2.00
Group G4.2 means Sph. power from ±2.25 to ±4.00 and Cyl. power from ±0.25 to ±2.00
Group G6.2 means Sph. power from ±4.25 to ±6.00 and Cyl. power from ±0.25 to ±2.00
Group G2.4 means Sph. power from 0.00 to ±2.00 and Cyl. power from ±2.25 to ±4.00
Group G4.4 means Sph. power from ±2.25 to ±4.00 and Cyl. power from ±2.25 to ±4.00
Group G6.4 means Sph. power from ±4.25 to ±6.00 and Cyl. power from ±2.25 to ±4.00
(7) Usually, the minimum quantity of each shipment of ophthalmic lenses is 1,000 pairs (2,000 pieces). For quantity between 1,000 and 5,000 pairs, all prices are on FCA/FOB Shanghai, China basis, Y&S will either deliver goods on FCA/FOB basis or charge freight and insurance fees respectively. If the quantity of each shipment less than 1,000 pairs (2,000 pieces), Y&S will charge USD100.00 extra fee under each shipment and either deliver goods on FCA/FOB basis or charge freight and insurance fees respectively.
(8) If the total quantity of each shipment is more than 5,000 pairs (10,000 pieces), all prices can be as on CFR (C&F) Overseas Main Port basis by sea. To have goods shipped by air, Y&S will either deliver goods on FCA Shanghai, China basis or on CPT, CIF, CIP basis, provided Y&S will charge air freight and insurance fees respectively.
(9) If the transaction is on CIF or CIP basis, insurance will be arranged by the Sell for 110% of invoice value covering all risks, provided no more requirement from the customer.
(10) The customer is suggested to accept adjustments on the quantity of each power/specification to fit for full box packing or full carton packing, it will be convenient for both Y&S and its customers to handle consignments and inventory.
(11) In order to deliver each order quickly, a maximum shortage of 5% on quantity or transaction value is allowed without prior notice. Y&S will provide a detailed list of the shortage to the customer after shipment. Y&S will either adjust relevant quantity and value in shipping documents in the current order or adjust with the customer in future orders.
(12) Lenses can be packed in Y&S’s general lens covers without showing Y&S’s information which is shown in this Purchase Guide free of charge. Provided any shipment with more than 5,000 pairs (10,000 pieces), Y&S can also pack lenses with one lens cover design appointed by the customer free of charge; otherwise, Y&S will charge an extra fee of USD100.00 for each design. For more details about packing, please refer to Package of Lenses.
(13) Y&S guarantees nominal base curve and the center thickness of semi-finished lenses. Y&S has the right to adjust backside curve (concave), but it’s guaranteed that the actual center thickness won’t be lower than the nominal center thickness indicated in this Purchase Guide.
(14) Pre-shipment inspections by China Entry-Exit Inspection and Quarantine Bureau (CIQ), SGS, BIVAC, Intertek, COTECNA, and others will be handled by Y&S, provided inspection applied and inspection fee paid by the customer when confirming orders.
(15) Mineral ophthalmic lenses (spectacle lenses of glass) are cleared by Chinese customs under H.S. Code 9001.40; plastic lenses (spectacle lenses of plastic) are cleared by Chinese customs under H.S. Code 9001.50; if necessary, H.S. Code of the importing country can be shown in shipping documents according to the customer’s requirement.
(16)
The following payment terms are accepted by Y&S:
L/C: By irrevocable L/C at sight, provided the covering L/C being received by Y&S on time and remaining valid for negotiation in China until the 21st day after shipment. L/C should be in English and show full contact information of Y&S.
T/T: 30% of the total transaction value to be paid by T/T while confirming the order; balance payment to be paid by T/T before shipment.
(17) Ophthalmic lenses need to be stored in a cool, dry, ventilated condition and it must avoid direct sunlight.
(18) Y&S is entitled to charge a storage fee, re-cleaning fee, re-drying fee and other relevant fees if the customer doesn’t pick up goods within 30 days after the goods are ready.
(19)
Goods are of China origin. Commercial Invoices, Packing Lists, Packing Details Lists and Bill of Lading or Air Waybill will be provided by Y&S under each shipment. Insurance Policy or Insurance Certificate will also be submitted when the transaction is made on CIF or CIP basis. One of the following Certificate of Origin can be submitted upon the customer’s request:
 
Certificate of Origin approved by CCPIT - China Council for the Promotion of International Trade (China Chamber of International Commerce)
Certificate of Origin (Asia-Pacific Trade Agreement) approved by CCPIT - China Council for the Promotion of International Trade (China Chamber of International Commerce)
Certificate of Origin (Form for China-Peru FTA) approved by CCPIT - China Council for the Promotion of International Trade (China Chamber of International Commerce)
Certificate of Origin (GSP Form-A) approved by China Entry-Exit Inspection and Quarantine Bureau (CIQ)
Certificate of Origin (Form F for China-Chile FTA) approved by China Entry-Exit Inspection and Quarantine Bureau (CIQ)
If any other documents are required, the customer needs to inform Y&S when confirming the order. Provided no other notice, all documents will be issued in the name of the customer’s company.
(20) Y&S keeps the right to adjust prices, technical data and conditions without prior notice. Adjusted prices, technical data, and conditions can be downloaded from Y&S’s website www.ystj.com.
 
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