The conical holes
The conical holes are smaller near to the eye and more open to the outside. This reduces the phenomenon of haloes of diffraction which you find in the cylindric holes.
The pinholeglasses with conical holes are specially good for medium-low miopia, presbyopia and astigmatism (from1,5 to 5 dioptres)
Pyramidal holes
Here the holes are square at the outside, which makes the lens more stable and at the same time very subtle and fine.The allignment is orthogonal. Therefore this type of glasses is perfect for people with low shortsightness, presbyopia and astigmatism, under two dioptres
Pinholeglasse with small holes
Who has more than 5 or 6 dioptres normally finds advantages using glasses with small holes, which allows a vision very similar to normal glasses.
If you are shortsighted (or only have astigmatism)
• till -1,5: pyramidal
• from-1,5 to - 5,5: conical
• over 5,5: small holes
If you are shortsighted and have astigmatism
add your shortsighteness with the astigmatism for every eye and regulate as above
If you have hyperopia
• till +1,5: pyramidal
• from +1,5 to -+5,5: conical
• over 5,5: small holes
If you have hyperopia + astigmatism
add your hyperopia with the astigmatism for every eye and regulate as above
If you have presbyopia
• till +1,5: pyramidal
• from +1,5 and more: conical
Who has medical problems (albinism, cataract, glaucoma and so on.)
please contact us