JPH06123854A - Spectacle for special sport and ophthalmoscope - Google Patents

Abstract

PURPOSE:To provide the spectacles for a special sport, which neither impedes the wearing of a protective mask nor the displacement of the spectacles even during excessive motion and provides normal vision, and the spectacle inspection unit. CONSTITUTION:The angle a that the surfaces of the right and left spectacle lenses 3 of the spectacles for a special sport contain is 133-124 deg.C, lugs 5 which have a 113.5-118 deg. bending angle beta are connected to both sides of the right and left lens frames 2, and temples 7 fitted to the lugs 5 are 15-22% shorter than normal spectacle temples 7. The ophthalmoscope for the spectacles holds the lenses at the same angles as the angle that the right and left spectacle lens surfaces of the spectacles for special sport contain and examines the eyes.

Description

Detailed Description of the Invention

[0001]

[Industrial field of use] Among glasses, glasses for special sports to be worn especially inside the protective surface used in kendo and bayonet, and glasses used in a two-lens full-face mask of respiratory protective equipment, and their optometers. It is about.

[0002]

2. Description of the Related Art In sports such as kendo and gun-kendo where you wear protective gear on your face, people with myopia use glasses that both sides of the eyeglass frame (parts centering on the tomo) are an obstacle. Can't wear armor face. For this reason,
I am practicing or playing games without glasses, but I often go behind because I cannot see the movements of the opponent's eyes. Therefore, instead of the temples for glasses, a device such as using a string or rubber string to wear glasses, or a structure in which the glasses frame has elasticity is disclosed in JP-A-57-163215 and Shokai 62-87312. It has been proposed in the publication.

On the other hand, apart from the above-mentioned case, in a two-lens type full-face mask with a respiratory protection device, a full-face mask in which exclusive glasses can be attached inside the mask is actually fair for a wearer who needs glasses. This feature is disclosed in Japanese Laid-Open Patent Publication No. 3-198, but the feature is that the left and right separate eyeglass lenses with frames are inserted into the small holes around the eyeglasses into which the eyeglasses are fitted and the pins attached to the eyeglasses are inserted into the eyeglasses. The structure is to be attached along with, because the full-face mask needs to be airtight against the outside air, and therefore the glasses temple cannot be used.

[0004]

FIG. 7 shows a horizontal cross-sectional view of a person wearing a normal negative eye at the position of the eye, and the normal eyeglass lens 21 is approximately parallel to the line connecting the left and right eyes. Yes, the distance between the cornea 22 and the spectacle lens 21 is usually 12 mm
It has become a degree. Even if the eyeglasses are attached to the temples 23 with lacing instead of the temples 23, the front width of the spectacle frame does not change, and the left and right tomo parts 24 still protrude so as to prevent attachment of the armor surface. Even if you forcibly put the spectacle frame inside the armor surface and attach the armor surface, the vibration of the armor surface due to extreme motion will cause the shake of the glasses and the relationship between the eyeglasses and the eyes will collapse, and the appearance of the object will be lost. It becomes a defect and feels troublesome. Further, in the case of an eyeglass frame in which the bridge portion 25 has elasticity, the eyeglass lens 21 is pushed in the direction of the eye and the parallel relationship between the eye and the eyeglass lens shown in FIG. , Causes headaches and lack of concentration needed for practice or competition. Therefore, it is not satisfactory for the swordsman.

On the other hand, as shown in FIG. 8, when the twin-lens full-face mask 30 is attached, eyeglasses for exclusive use of the mask 31
When looking at the horizontal cross section at the position of the human eye attached inside the
Are in a C-shaped positional relationship. Because of this, the cornea 22
The distance between the eyeglass lens 32 for mask and the eyeglass lens 32 for mask is 10 mm at the outer corner of the eye, 11 mm at the center, and 15 mm at the head of the eye. When the mask 30 is worn, the appearance of the image is abnormal, anxiety occurs, and a headache occurs after a long time, which is a practical problem. This cause is shown in FIG.
This is because the correction effect of the spectacle lens changes depending on the positional relationship between the eye and the mask-dedicated spectacle lens 32 as shown in FIG. 7, and therefore, the positional relationship between the eye and the mask-dedicated spectacle lens when the full-face mask 30 is mounted can be reproduced. It is necessary to use eyeglass lenses for masks that have been re-corrected according to the wearer's eyes in this state. However, at present, there is no optometer that can reproduce such a positional relationship.

Therefore, the present invention does not hinder the wearing of the armor surface,
In addition, we provide special sports eyeglasses that do not cause blurring of the glasses even with extreme movements and have a normal appearance, and also an eye examination for lens correction when wearing such special sports eyeglasses or twin-lens full face mask exclusive eyeglasses. To provide a container.

[0007]

Means for Solving the Problems The cornea 22 and the spectacle lens dedicated to the mask with the above-mentioned twin-lens full-face mask attached
The positional relationship of 32 is as shown in FIG. 8, and the angle at which the extension lines of the left and right spectacle lenses intersect is in the range of 131 to 133 degrees, although there are some differences depending on the person, and 132 degrees on average. Is.

A comparison between the space limitation of the face side portion received by the full face mask and the space limitation of the face side portion received by the inside of the armor surface is as shown in FIG. 9, and it can be seen that they are very similar. In the figure, 40 is an armor surface, 41 is a surface metal fitting, 42
Is a mask and 43 is a cushion.

Therefore, in the special sports eyeglasses of the present invention, the angles formed by the left and right eyeglass lens surfaces are 133 degrees to 124 degrees.
The angle is 113.5 degrees to 118 degrees and the tomo with a bending angle of 113.5 degrees is provided on both sides of the left and right lens frames, and the temple length is 15% to 22% shorter than ordinary glasses temples. .

In this case, since the size of the full-face mask facepiece 30 is roughly determined, the angle formed by the left and right spectacle lens faces is about 133 to 131 °, but in the case of a sports armor face. There are various shapes and sizes, and the angle formed by the left and right spectacle lens surfaces can be adopted in the range of about 133 to 124 degrees.

On the other hand, when the above special sports glasses are used, the correct positional relationship between the eye and the spectacle lens is broken, and the correction effect of the lens is changed. Therefore, to compensate for this, an optometer for holding the lens at the same angle as the angle formed by the left and right spectacle lens surfaces of the spectacles used and performing optometry is required. In other words, as an optometer,
At 1/3 and 2/3 locations, bend the holders inward by 23.5 to 28 degrees to form a house shape as a whole, and join the holder to the front where the bent portions extend at an intersection angle of 133 to 124 degrees. It will be configured.

[0012]

FIG. 10 is a cross-sectional view comparing the wearing state of normal glasses and the wearing state of glasses in which the extension line of the glasses lens of the present invention has a crossing angle of 132 degrees. When the width is R and the front width of the spectacle frame where the extension line of the spectacle lens has a crossing angle of 132 degrees is R ′,
R'is

[0013]

[Equation 1] R '= Rcos24 ° = 0.913R, the front width is reduced by about 9%, and the protruding portions of the frame centered on the left and right tomo shown in FIG. The spectacle frame does not obstruct the armor surface attachment. However, the length L of the temple must be shortened to L'only in the retracted portion of the frame.

Next, with respect to changes in the correction effect of the lens, in FIG. 7, the distance from the apex of the cornea of the eye to the inside of the spectacle lens is generally called the corneal apex distance VD,
It is usually 12 mm, and if this distance changes, the correction effect also changes. Now, when the eye and the spectacle lens are parallel as shown in FIG. 7, assuming that the lens power is D and the VD change amount (change amount based on 12 mm) is h, the spectacle lens change frequency ΔD
Is

[0015]

[Equation 2]

It is represented by

As a concrete example, for a person with myopia of -10 degrees and VD of 10 mm, h = 12-10 = 2.

[0018]

[Equation 3]

This means that the correction effect is added by 0.2D. That is, the image formed on the retina feels great.
Also, if VD is 15 mm, h = 12−15 = −3, so

[0020]

[Equation 4]

The correction effect is reduced by 0.3D. That is, the image formed on the retina feels small.

On the other hand, when the relational positions are as shown in FIG. 8, it is not a simple phenomenon as described above, but a complicated phenomenon, and it is not possible to predict how much the correction effect will appear by calculation. It is more realistic to reproduce the positional relationship of the lenses and measure the eye by actual measurement.

[0023]

Embodiments will be described in detail below with reference to the drawings. (1) Glasses for Special Sports FIG. 1 is a perspective view showing glasses 1 for special sports of one embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a top view thereof. The angle α formed by the surfaces of the left and right lenses 3 is approximately 133 degrees to 124 degrees.
The left and right lens frames 2 and the bridge 4 are brazed to each other at a degree (here, 132 degrees), and the curved reinforcing bar 6 is brazed to the left and right lens frames to give elasticity to the entire spectacle frame. It has a structure. Further, the tomo 5 with a bending angle β of about 113.5 degrees to 118 degrees (here, 114 degrees) is attached to the left and right lens frames 2, and the temple 7 is screwed to the tomo 5. The length of the straight portion of the temple 7 is Is usually about 16% shorter than the temples for glasses, so that the curved parts of the temples 7 and the ears can be held properly. The length of this straight line is ±
There is a tolerance of about 1%, and otherwise, the feeling of wearing glasses is uneasy. 8 is a nose pad.

In the case of the glasses for special sports, the angle α formed by the left and right lens surfaces can be adopted in the range of about 133 degrees to 124 degrees according to the protective surface of various sports. That is, when α> 133 degrees, the front width R ′ of the spectacle frame becomes large, which causes trouble when mounting the armor surface.
At 124 degrees, the angle between the eyes and the lens is too great, the distortion effect of the lens becomes large, and the image appears distorted, which causes inconvenience.

The angle α formed by the left and right lens surfaces and the bending angle β of the tomo are geometrically related. When α = 133 degrees, β = 113.5 degrees, and when α = 124 degrees, β = 118. It becomes degree. Further, the length of the temple is also related to α, and when α = 133 degrees, L ′ = (1-0.15) L, and when α = 124 degrees, L ′ = (1-0.22) L.

Depending on the configuration of the glasses, there are some which use the front, but in that case, the front is angled so that the left and right lens surfaces are set to a predetermined angle α, The lens frame will be brazed.

As the left and right lenses 3, lenses corrected by each person using an optometer described later are used. When wearing these special sports glasses, there are no special considerations just as with normal glasses, and you can wear the protective surface without any problems while wearing glasses, and Even if he exercises or plays a game, he will not have any visual problems.

(2) Ophthalmoscope FIG. 4 is a perspective view of an optometer 10 showing another embodiment of the present invention, FIG. 5 is a front view thereof, and FIG. 6 is a top view thereof. In this optometer 10, left and right holders 12 are fixed to a front surface 11, and refraction portions 11a and 11b are provided at two positions on the front surface 11 near 1/3 and 2/3, respectively. It is refracted so that the extension has a crossing angle of 133 to 124 degrees (here, 132 degrees). In addition, the scale holder 1
3. The rotation ring 15 with the lens supporter 16 is attached, and the tomo 14 is attached to both ends of the holder 12 at an arbitrary angle.

In a commonly used ordinary optometer, the front, the left and right holders, and the left and right tomo are on a straight line when viewed from the top, whereas the optometer according to the present invention is
Approximately 1/3 and 2/3 of 11 are refracted inward at an angle of γ = 23.5 degrees to 28 degrees to form a house shape as a whole, and the holders 12 on both sides joined to the front 11 are extended. α = 133 degrees to 1
It is characterized in that the tomo 14 is attached to both ends of the holder 12 so as to have a crossing angle of 24 degrees, whereby the relational position between the eye and the spectacle lens in the special sports glasses is determined by the optometer. I am trying to reproduce it.

Next, Table 1 shows the results obtained by selecting 10 persons with myopia aged 21 to 44 years and using the general-purpose optometer and the optometer according to the present invention. Since the correction target varies from individual to individual, myopia is set to 0.8 to 1.0, and it is important to be able to see it in a comfortable shape without fatigue. From Table 1, the person A has a right vision of 0.
In 4, the optometry for general use is -0.75, and in the optometry according to the present invention, the degree of the lens of -0.75 is also a correction value, and the left visual acuity is 0.3.
The correction value is -1.0 for the general optometry and -0.75 for the optometry according to the present invention. The difference between the correction values of the general-purpose optometry and the optometry according to the present invention is indicated by ΔD. However, -0.25 is overlooked by 0.25D, so it is necessary to weaken the lens power by 0.25D in order to see it easily. I mean. It can also be seen that there are individual differences in the optometry results even for people with the same visual acuity.

In this way, the optometry device according to the present invention is used for optometry, and the full-face mask fitted with the dedicated spectacle lens having the power according to the correction value of each person is actually worn for a long time (4 hours or more). As a result of performing various actions, he said that the work efficiency was improved, and it was easier and less tired than when all were wearing them with the naked eyes. On the other hand, when wearing a spectacle lens with the frequency of optometry with an ordinary optometer, he felt image distortion, complained of headache in a short time, and felt tired in about 30 minutes without persistence.

[0032]

[Table 1]

[0033]

【The invention's effect】

(1) Special sports glasses bridge and eyeglass frame mounting angle is 133 degrees to 124 degrees, tomo bending angle is 113.5 degrees to 118 degrees
The length of the temple is shorter than that of normal glasses, so that you can wear the kendo and gun kendo armor surface without any trouble while wearing the glasses, and the lenses will not shake due to sudden movements or movements. With the correction effect, I was able to see comfortably and comfortably, and my handicapped handicap almost disappeared.

The glasses for special sports are also suitable for wearing ski goggles, and the benefit given to the skier who needs myopia was also shown as an unexpected effect.

(2) By making a predetermined angle on the holder of the optometer, it is possible to perform optometry in the same state as when wearing special sports glasses or a twin-lens full face mask with built-in special glasses, and the optimum spectacle lens By selecting the degree, it was possible to see the image relatively normally, without feeling anxiety, and to be in a state where the wearer did not get tired even after wearing for a long time.

When the eye and the spectacle lens are in a special relational position as described above, the correction effect cannot be predicted in advance by calculation, and there are individual differences. Therefore, in order to determine the optimum spectacle lens degree, the present invention is used. The optometry device has a large optometry effect, and it is a great benefit especially for persons with strong myopia when wearing glasses for special sports or full-face masks.

[Brief description of drawings]

FIG. 1 is a perspective view of special sports glasses according to an embodiment of the present invention.

FIG. 2 is a front view of the special sports glasses.

FIG. 3 is a top view of the special sports glasses.

FIG. 4 is a perspective view of an optometer according to another embodiment of the present invention.

FIG. 5 is a front view of the optometer.

FIG. 6 is a top view of the optometer.

FIG. 7 is a horizontal cross-sectional view at an eye position when wearing normal glasses.

FIG. 8 is a horizontal cross-sectional view at the position of the eye when the twin-lens full-face mask incorporating special glasses is worn.

FIG. 9 is a diagram comparing and comparing the space restrictions imposed on the face side face when the armor face and the full face mask are respectively attached.

FIG. 10 is a diagram showing a comparison of horizontal cross sections at eye positions when wearing normal glasses and glasses for special sports, respectively.

[Explanation of symbols]

1 ... negative for special sports, 2 ... lens frame, 3
… Lens, 4… Bridge, 5,14… Tomo, 7,18
… Temple, 10… Optoscope, 11… Front, 12…
holder.

Claims (2)

[Claims] 1. The angle formed by the left and right eyeglass lens surfaces is 133.
Degree of bending is 11 to 124 degrees and bending angle is 113.5 to 118 degrees
Eyeglasses for special sports, which are equipped with tomo of degrees on both sides of the left and right lens frames, and a temple having a temple length of 15% to 22% shorter than that of ordinary temples is joined to the tomo. 2. The front part of the optometer is refracted inward by 23.5 degrees to 28 degrees at approximately 1/3 and 2/3, respectively, to form a house shape as a whole, and the extension of the refracted portion is 133 degrees to 133 degrees. An optometer with a holder connected to the front with a crossing angle of 124 degrees.