LOCS II vs. III Standard Transparency Set

The 8.5" x 11" LOCS III Standard Transparency Set is distinctly different from the LOCS II Standard. The LOCS III Standard is needed for classification at the slit lamp and is a prerequisite for training and certification in the LOCS III method. The images at right are typical images used in LOCS III grading.


LOCS III Standard
The LOCS III transparency contains an expanded set of standard images on all four scales, and the grading scales are decimalized with each standard illustrating severity representing 1.0, 2.0, 3.0 etc. Intermediate grades (e.g.2.6) are possible with LOCS III. LOCS III has proved to be an effective means of grading longitudinal changes in each of the four features (NO, NC, C and P) of the lens, and it has been used in a wide variety of basic science applications, pharmaceutical trials, cross-sectional and longitudinal epidemiological studies, surgical studies, and in the testing and development of surgical instruments and methods (see bibliography).


   Each set of the LOCS III standards contains the following:
  •   LOCS III Instructions

  •   LOCS III color transparency

  •   A reprint of the original article describing the development of the LOCS III system.

The LOCS III standard transparency set contains an expanded set of standard images compared to the LOCS II standard set. The LOCS III set contains six slit images for grading nuclear color (NC) and nuclear opalescence (NO), five retroillumination images for grading cortical cataract (C), and five retroillumination images for grading posterior subcapsular (P) cataract. Cataract severity is graded on a decimal scale. The grading intervals are approximately equal within each scale. The simplicity of the system and its ease of use underlies its wide appeal as a simple, sensitive, validated method for assessing cataract type and severity. It has also been used widely to monitor cataract progression in longitudinal, epidemiological or pharmaceutical trials.


LOCS II Standard
The LOCS II standard transparency contains fewer standard images than that of LOCS III. LOCS II uses an integer scale (e.g. I, II, III, IV, etc.) and intermediate grades (e.g. between I and II) are not possible. LOCS II was widely used in epidemiological studies of risk factors for the three classes of age-related cataract (see LOCS III Bibliography.pdf), but when users expressed interest in assessing the effect of various factors on the rates of cataract progression, a more robust system of grading longitudinal changes (rates) was developed. This led to the introduction of LOCS III.

Each set of the LOCS II standards contains the following:
  •    LOCS II Instructions

  •    A reprint of the original article describing the development of the LOCS II system

  •    LOCS II color transparency

   The LOCS II standard transparency set contains slit and retro-illumination images. The LOCS II set contains one slit image for grading nuclear color (NC) and four slit images for grading nuclear opalescence (NO), five retroillumination images for grading cortical cataract (C), and four  retroillumination images for grading posterior subcapsular (P) cataract. Cataract severity is graded on an integer scale. The grading intervals are approximately equal within each scale. The simplicity of the system and its ease of use underlies its wide appeal as a simple, sensitive, validated method for assessing cataract type and severity.
Pricing
Commercial Rate: US$400.00/set plus shipping and handling. (LOCS II or III)

Academic Rate: US$200.00/set plus shipping and handling. (LOCS II or III)
Academic institutions may apply for a 50% discount of the listed price by submitting:
  • A letter from the department head certifying the academic nature of the project, including the users to be trained, and the length of the project.

  • Documentation of the governmental, philanthropic, or other non-industrial source(s) of funding for the research.

Place an Order
When placing an order for the LOCS Standard, please indicate how many sets you need and assume the following shipping and handling fees will be added to the total on your invoice:

  1. For shipment of 1-5 sets via FedEx within the US we will add a handling charge of US$50.00.

  2. For orders of five-ten (6-10) sets to be shipped within the US, there will be a handling charge (see below) and actual shipping charges added to the total cost of the sets.

  3. For orders to be shipped outside of the US, there will be a handling charge based on the number of sets ordered (see below) and actual shipping costs added to the cost on the invoice.

  4. If a purchaser wants us to use his/her FedEx account number (or the account number of another courier) to pay for the shipping expenses, we will not add shipping charges on the invoice.

  5. We have these materials in stock. An electronic invoice will be sent to you when the order is placed.

  6. All invoices must be paid in advance with either a wire transfer or a check from a US bank or a check from the American branch of a foreign bank. Checks should be made payable to:

    Chylack Incorporated
    883 Fearrington Post
    Pittsboro, NC 27312
    USA

  7. Should you wish to wire payment, any and all duty or transfer fees should be anticipated in advance and not deducted from the amount invoiced.

  8. We do not accept credit card orders.

  9. Upon receipt of payment, materials will be shipped immediately.

Handling Charges:
     For orders of 1 - 5 sets, the handling charge will be:       US$  50
     For orders of 6 -10 sets, the handling charge will be:      US$  75
     For orders of 11- 20 sets, the handling charge will be:    US$ 100
     For orders of 21- 40 sets, the handling charge will be:    US$ 150
     For orders of 41- 60 sets, the handling charge will be:    US$ 200
     For orders of 61- 80 sets, the handling charge will be:    US$ 250
     For orders of 81-100 sets, the handling charge will be:   US$ 300

If you have any questions, please contact Lacey Chylack.

   

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To order the LOCS III Transparency

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Available Languages:
​​​​​​​All training and instruction materials are in English. Translations of the basic written instructions are available in the following languages:
  • Brazilian,
  • Bulgarian,
  • Croatian,
  • Czech Republic,
  • Danish,
  • Dutch,
  • Finnish,
  • French,
  • German,
  • Hungarian,
  • Italian,
  • Japanese,
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  • Ukrainian,
  • Polish,
  • Portuguese,
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  • Russian,
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  • Thai,
  • Turkish.