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YY 0065-2016: Ophthalmic instruments - Slit-lamp microscopes
YY 0065-2016
YY
PHARMACEUTICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 11.040.70
C 40
Replacing YY0065-2007
Ophthalmic instruments - Slit-lamp microscopes
(ISO 10939. 2007, MOD)
ISSUED ON. JANUARY 26, 2016
IMPLEMENTED ON. JANUARY 1, 2018
Issued by. China Food and Drug Administration
Table of Contents
Foreword . 3 
1 Scope .. 5 
2 Normative references . 5 
3 Terms and definitions . 5 
4 Requirements . 6 
5 Test methods . 9 
6 Accompanying files .. 15 
7 Marks . 15 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard replaces YY 0065-2007 "Ophthalmic instruments - slit-lamp
microscopes"; compared with YY 0065-2007, the main technical changes of
this standard are as follows.
-- Add the requirements for focus difference between left and right
observation systems (see Table 1, serial number 7);
-- Add the requirements for optical radiation hazards (see 4.4);
-- Delete the requirements for minimum spot size (2007 version 4.1.3);
-- Delete the requirements for slit spot illuminance (2007 version 4.1.6);
-- Delete the requirements for diameter of field of view (2007 version 4.1.5);
-- Delete the requirements for mechanical movement (2007 version 4.2);
-- Delete the requirements for environmental test (2007 version 4.5).
This standard uses the redrafted law to amend and adopt ISO 10939.2007
"Ophthalmic Instruments - slit-lamp microscopes".
Compared with ISO 10939.2007, there are technical differences in this
standard. The terms involved in these differences have been indicated by a
vertical single line (|) in the marginal position on its outer side. The technical
differences between this standard and ISO 10939.2007 and its causes are as
follows.
-- With regard to normative references, this standard has made adjustments
with technical differences to adapt to China's technical conditions. The
adjustments are centrally reflected in Chapter 2 “normative references”
and the specific adjustments are as follows.
● Use GB 9706.1 which is adopted to be equivalent to international
standard to replace IEC 60601-1;
-- Add "this standard applies to universal slit-lamp microscopes" in the
scope of Chapter 1.
-- Add Chapter 5 test methods. As the recommended test methods, it makes
the requirements of this standard operable. There is no test method in
ISO 10939.2007.
Ophthalmic instruments - Slit-lamp microscopes
1 Scope
This standard, together with ISO 15004-1 and ISO 15004-2.2007, specifies the
requirements and test methods for slit-lamp microscopes.
This standard applies to universal slit-lamp microscopes. This standard does
not apply to slit-lamp microscope accessories, such as camera equipment and
lasers. If there are differences, this standard takes precedence over ISO
15004-1 and ISO 15004-2.2007.
2 Normative references
The following documents are essential for the application of this document. For
dated references, only the dated version applies to this document. For undated
references, the latest edition (including all amendments) applies to this
document.
GB 9706.1 Medical electrical equipment - Part 1. General requirements for
safety (GB 9706.1-2007, IEC 60601-1.1988, IDT)
ISO 15004-1 Ophthalmic instruments - Fundamental requirements and test
methods - Part 1. General requirements applicable to all ophthalmic
instruments
ISO 15004-2.2007 Ophthalmic instruments - Fundamental requirements
and test methods - Part 2. Light hazard protection
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Slit-lamp microscope
It is an instrument that consists of microscope and rotating illumination system
which is capable of producing slit image.
e) At the highest visual angular magnification, the resolution of field-of-view
center shall be at least 1800Nlp/mm (N is numerical aperture).
4.3.2 High eye point eyepiece
If the manufacturer claims to be high eye point eyepiece, the distance between
the exit pupil of observation system and the closest part of eyepiece shall be
no less than 17mm.
4.4 Optical radiation hazard of slit-lamp microscopes
Slit-lamp microscopes shall meet the requirements of ISO 15004-2.2007 for
light hazard protection.
Slit-lamp microscopes shall be classified as Class-1 instruments or Class-2
instruments according to ISO 15004-2.2007 Chapter 4. ISO 15004-2.2007
applied to slit-lamp microscopes is as follows.
a) For Class-1 slit-lamp microscopes.
1) 5.1, 5.2 and 5.4 of ISO 15004-2.2007 apply.
2) The test methods of 6.1, 6.2, 6.4 and 6.5 of ISO 15004-2.2007 apply.
3) If it is determined to be Class-1 instruments, there are no more
requirements; if it is determined not to belong to Class-1 instruments,
more requirements specified in b) shall apply.
b) For Class-2 slit-lamp microscopes.
1) 5.1, 5.3 and 5.5 of ISO 15004-2.2007 apply.
2) The test methods of 6.1, 6.2, 6.3, 6.4, 6.5 and 6.6 of ISO 15004-2.2007
apply.
3) ISO 15004-2.2007 Chapter 7 applies.
If the intended use of slit-lamp microscopes includes the use of an accessory
90D lens, measure the related exposure of cornea and lens. The 90D lens
(such as Volk lens) shall be placed at 7mm position behind the focal plane of
slit-lamp with the largest illuminated area. Exposure measurement is taken at
the minimum dimension point of the illuminated area 7mm behind the 90D
lens.
5 Test methods
5.1 Overview
microscope) to focus reticle, and the image is clear. Measure the maximum
amount of movement between the two after changing the magnification. The
result shall meet the requirements of No. 4 in Table 1.
5.6 Errors of the focal plane of lighting system with respect to
mechanical axis of rotation
Place the reticle with adjustable front-to-back distance on object plane; adjust
the width of slit to be minimized; use the microscope with intermediate visual
angular magnification to observe and adjust it to the zero-line coincidence of
slit image and reticle. As shown in Figure 1, the lighting system and the
observation system rotate within the left (right) ≤ 45. When the rotation angle is
α, if the slit image deviates from the reticle zero-line, read out the lateral
deviation value (Δa)α from the reticle; then adjust the reticle so that the slit
image coincides with the zero-line of the reticle. Record the axial distance Δa
before-after adjustment of the reticle. The values of (Δa)α and Δa measured
shall be in accordance with the regulations of No.5 in Table 1.
5.7 Confocal errors of observation system and lighting system at slit
surface
Use visual angular magnification to firstly adjust slit image to vertical position
and record the clearest diopter-value of the slit image. When the rotating slit is
tilted at any angle, use simple eye to observe; adjust the diopter loop of left
(right) eyepiece to have clear slit; measure the displacement amount of left
(right) eyepiece; use the same method to measure the diopter difference of left
(right) eyepiece when it is at the highest and lowest visual angular
magnification. The measured maximum displacement amount shall be in
accordance with the provisions of No. 6 in Table 1.
5.8 Focus difference of left and right observation system
Adjust the eyepiece diopter of slit-lamp microscope to zero and measure it at
the highest visual angular magnification. Regard cross reticle as test object,
adjust the f...