Shin-Nippon BR-7 Operation manual

Refractor

Model:BR-7

Operation Manual

Read this manual thoroughly before use.

Keep this manual on hand at all times.

I-050707

EU Representative

FAUSTO GUZZETTI

VIA SOLFERINO,5 21057 OLGIATE OLONA(VA), Italy

Supplied by

AJINOMOTO TRADING, INC.

SHIN-NIPPON Medical & Ophthalmic Instruments Dept.

EAST WING 7TH FLOOR, TFT BUILDING 3-1-22 ARIAKE, KOTO-KU, TOKYO 135-8071, JAPAN

TEL: 813-3528-4416 FAX: 813-3528-4426

http//www.shin-nippon.jp

Manufactured by

TOWA MEDICAL INSTRUMENTS Co.,Ltd.

1698-2 Oaza Nakano Nakano-shi, Nagano-ken,383-0000 Japan

I-050707

CONTENTS

1. Specification Page 2

2. Exterior Features Page 4

(1) Front-side Page 4

(2) Back-side Page 5

3. Usage Page 6

(1) Setting Page 6

(2) Spherical lens Page 6

(3) Astigmatic lens Page 7

(4) Accessory lens Page 7

(5) Auxiliary lens Page 8

(6) Cross cylinder Page 9

(7) Rotating prism Page 9

(8) Cornea sight equipment Page 10

(Revision value tables 1, 2 --- Page 12)

(9) Near point card Page 13

4. Eye inspection method Page 14

(1) Setting Page 14

(2) Eye inspection by cloud fog method Page 15

(3) Precise measurement of astigmatic axis, astigmatic degree Page 16

(4) Precise measurement of spherical degree (Red green test) Page 18

(5) Eye balance tests

Way of using polarization filter/rotating prism Page 19

(6) Inclination (long distance) measurement

Using polarization measurement/Maddox rod and rotating prism Page 20

(7) Sorting of measurement result Page 22

(8) Measurement of presbyopia Page 22

(9) Measuring inclination at short distance

Measurement of horizontal/perpendicular inclination Page 23

(10) Other measurement

Concentration and dispersion/Perpendicular dispersion Page 24

(11) Degree conversion Page 25

5. Maintenance and check Page 26

(1) Daily maintenance Page 26

(2) Check Page 26

1. Specification

(1) Model: REFRACTOR BR-7

(2) Measuring range:

Near sight: 0.00 ～ -19D, 0.25D interval

Hypermetropia: 0.00 ～ +16.75D, 0.25D interval

(It is possible to measure at 0.12D interval when using a built-in assistance lens.)

Astigmatic: 0.00 ～ -6.00D, 0.25D interval

(It is possible to measure up to -8.00D when using attachment lens -2D.)

(It is possible to measure at 0.12D interval when using attachment lens 0D.)

(The astigmatic axis is 0 ～ 180 degree, 5 degree interval scale.)

(3) Cross cylinder: +/-0.25D (+/-0.37, +/-0.50D are an option.)

(4) Rotary Prism: 0 ～ 20△, 1△ interval scale

(5) Assistance lens:

R ——— Lens for Retinoscope (S+1.50D)

P ——— Polarization lens

RMV ——— Perpendicular red Maddox (WMV perpendicular white Maddox)

RMH ——— Horizontal red Maddox (WMH level white Maddox)

R side ——— Red filter (Green filter on L side)

+.12 ——— Spherical lens +0.12D

PH ——— Pinhole

6△U ——— Separation prism (the frame on L side is 10*I)

+/-.50 ——— Fixation cross cylinder

OC ——— Shelter board

(6) Pupil distance: 48 ～ 75mm, 1mm interval scale

(7) Concentration: △-400 mm

(8) Forehead support control: 16mm

(9) Weight: About 4.25 kg

(10) Size: W318 x D293 x H96

(11) Accessories: Near point scale, near point folder

Near point card

Assistance lens (Two C-0.12, two C-2.00)

Vinyl covers for dust protection

Characteristic of BR-7

1) Since the cross cylinder and the rotary prism keep a constant distance from the eyes by the

double loupe (turret) method, it is possible to do precise measurement and it can be used easily.

2) Since the cross cylinder loupe is automatically connected with the astigmatic axis by the

synchronic mechanism, it shows efficiency in the astigmatic precise measurement.

3) It becomes easier to use with front observation and the front operation.

4) The degree display window is big and can be easily read.

5) The combination of the eyesight equipment and the various assistance lens can provide a wide

variety of inspection such as eye view function inspections.

6) As for the mechanism of concentration for short distance inspection, all optical mechanisms are

set correctly by the lever operation.

2. Exterior Features (See Figure 1)

【Front-side】

(1) Attachment mounts to the unit

(2) Fixed knob for the mount

(3) Rotation knob: Used to rotate the direction of the main body.

(4) Horizontal control knob: Used for horizontal adjustment of the main body.

(5) Level vial: Used as a target of adjusting the leveling.

(6) PD scale: Displays a distance among the pupils.

(7) PD knob: Used to adjust distance among pupils.

(8) Rotating prism: Enables to inspect inclination and to test eye balance.

(9) Prism revolving knob: Used to adjust the prism degree.

(10) Assistance lens knob: Used to inspect various view functions.

(11) Spherical degree scale: Scale to read off spherical degree.

(12) Spherical dial: Enables to set the spherical lens with 0.25D step.

(13) Spherical knob: Enables to set the spherical lens with 3.00D step.

(14) Cylinder degree scale: Displays the astigmatic degree.

(15) Astigmatic lens knob: Enables to set the astigmatic lens with 0.25D step.

(16) Astigmatic axis knob: Used to adjust the astigmatic lens axis.

(17) Astigmatic axis scale: Displays the axis angle of the astigmatic lens axis.

(18) Cross cylinder: Used to check precise astigmatic degree, astigmatic axis, presbyopia

straightening and distant spherical surface degree.

(19) Inversion knob: Used to change the axis and degree of the cross cylinder.

(20) Astigmatic axis assistance scale: Reference scale for the astigmatic lens axis.

(22) Forehead support knob: Used to adjust the forehead position back and forth.

(24) Cornea sight window: Enables to see the position of cornea of an examinee.

(26) Convergence lever: Enables the main body to be congested.

(27) Near point range finder fixation screw: Used to fix the near point range finder.

(28) Near point range finder attaching part: Attachment for the near point range finder.

【Back-side】

(21) Eye inspection window: This is a window to observe an examinee.

Each displayed lens is set in this position.

(23) Forehead support: Used to support the forehead of an examinee.

(25) Cheek stopper attachment: Attachment to fix the associated cheek stopper.

(29) Near point card: Accessory for inspecting near-point.

(30) Card holder: Holder to fix the near point card.

(31) Cheek support: Used to support cheeks of an examinee.

(32) Auxiliary lenses: Enable to change its measuring range and lens feeding step.

(C-2.00D, C-0.12D)

3. Usage

(1) Setting

(A) Installation to eye inspection stand

(B) Horizontal control

Turn the horizontal control knob (4) so that air bubble in the standard part (5) comes to the

*mark.

Insert the card holder (30) in the tip of near point range finder. Since near point range finder is

divided into tow at the middle point, set the display surfaces (inch displays) of them together.

The card folder slides and moves on near point range finder. Insert near point card (29) into the

spring which is stuck on the card folder like (fig.5). Next, insert a near point range finder in near

point range finder attachment part (28) and fix with near point range finder fixation screw (27).

Incidentally, when not using, stand it like (fig.6).

(fig.5) (fig.6)

(fig.7)

（D) Set of cheek support

Put cheek support in cheek support (25) like (fig.7), and insert and fix it on the frame of eye

inspection window (21).

(2). Spherical lens

When setting only the spherical degree (writing with S below), set assistance lens knob (10) to 0 or

0_, and turn astigmatic lens knob (15) so that scale of astigmatic number (14) displays .00. When

turning spherical lens dial (12) in this condition, it is possible to set the interval of -19.00 -0.00 -

+16.75D in spherical degree scale (11) to 0.25D scale with the diopter (written as D below) display

to set a lens. Since it is displayed with 3 digits or 4 digits of the figure, when 025 is displayed, read

as 0.25D and when 1125 is displayed, read as 11.25D.

To make the degree of the lens change faster, turn spherical lens knob (13) to change S every 3.00D.

(fig.8)

(fig.9)

(3). Astigmatic lens

When astigmatic lens knob (15) is turned, 0.00-6.00D are set in the 0.25-D scale and the astigmatic

degree (written as C below) is displayed in astigmatic scale (14). See (fig.10).

Incidentally because the astigmatic lens of this instrument adopts a cloud fog expression regulation

eye method (the P11 reference), all negatives are adopted.

A needed astigmatic axis (astigmatic lens axis) is set when turning astigmatic axis knob (16) and

adjusting an index to astigmatic axis scale (17). See (fig.12).

(fig.10) (fig.11)

(4). Accessory lens

When it is not possible to measure astigmatic degree only with the cylinder lens (Max.6D) which

was incorporated into the body, insert the auxiliary lens C-2.00(32) which is included in assistance

lens box in regulation eye window (21) so that it is possible to spread a measuring range. (Up to Max.

8D)

Incidentally, at that time, surely set the pin which is stuck on the back of auxiliary lens C-2.00(32) in

the pinhole which is inside astigmatic axis assistance scale (20). (When a pin is shifted, the error

may occur to the astigmatic degree and the angle.)

Also, when wanting to set an astigmatic degree at smaller step then 0.25D step, set auxiliary lens

C-0.12 (32) as above-mentioned, so that it is possible to measure at 0.12D step.

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