After many technical development and advancement prescription glasses have come a long way from just been stereotype to versatile fashionable accessories. The functionality of prescription glasses can be classified into two groups: one is to offer vision correction and the other is eye protection. Prescription eyeglasses are generally used to correct nearsightedness and farsightedness. For eye protection, sunglasses are generally recommended as it offers UV protection and allows cooler vision under sunlight.
Under prescription glasses category there are many different types of vision correction lenses available like single vision lenses, bifocal, progressive and free form lenses (free form lenses are the latest technological development which offers wider and comfortable vision from the lenses).
In this article we are going to discuss about bifocal eyeglasses which is the lowest form of multi-focal prescription glasses. Single vision lenses as the name suggest these lenses can only offer mono single vision correction that is either nearsighted or farsighted however if you are suffering from multiple vision disorder then two separate glasses are required however to avoid this inconvenience bifocal eyeglasses were developed. As the name suggest these lenses consists of two different vision areas that is for distance and reading thus the inconvenience of carrying two separate glasses are eliminated.
There are different designs of bifocal eyeglasses available and it is better that if we understand its design:
Executive bifocal eyeglasses:
Executive bifocal has a prominent line running across the lenses which divides the lenses into two halves. The upper portion of the lenses are completely dedicated for distance vision and lower half of the lenses can be used for distance vision.
Kryptok Bifocal Eyeglasses:
Unlike executive bifocal where there is a line dividing the lenses, kryptok bifocal has a 28mm semi-circle at the bottom of the lenses. Theses lenses are more cosmetically appealing as compared to executive bifocal as the reading portion of the lenses are not completely visible due to its design thus the onlookers will not notice the reading portion clearly.
Flat Top Bifocal Eyeglasses:
Flat top bifocal eyeglasses are similar to Kryptok bifocal in terms of design but the only difference is that instead of a complete semi-circle for at the bottom of the lenses the upper portion of the semi-circle are cut straight thus the reading portion of the lenses look like a rectangle with curved sides. As compared to kryptok bifocal lenses the reading portion of the lenses are clear visible.
Under prescription glasses category there are many different types of vision correction lenses available like single vision lenses, bifocal, progressive and free form lenses (free form lenses are the latest technological development which offers wider and comfortable vision from the lenses).
In this article we are going to discuss about bifocal eyeglasses which is the lowest form of multi-focal prescription glasses. Single vision lenses as the name suggest these lenses can only offer mono single vision correction that is either nearsighted or farsighted however if you are suffering from multiple vision disorder then two separate glasses are required however to avoid this inconvenience bifocal eyeglasses were developed. As the name suggest these lenses consists of two different vision areas that is for distance and reading thus the inconvenience of carrying two separate glasses are eliminated.
There are different designs of bifocal eyeglasses available and it is better that if we understand its design:
Executive bifocal eyeglasses:
Executive bifocal has a prominent line running across the lenses which divides the lenses into two halves. The upper portion of the lenses are completely dedicated for distance vision and lower half of the lenses can be used for distance vision.
Kryptok Bifocal Eyeglasses:
Unlike executive bifocal where there is a line dividing the lenses, kryptok bifocal has a 28mm semi-circle at the bottom of the lenses. Theses lenses are more cosmetically appealing as compared to executive bifocal as the reading portion of the lenses are not completely visible due to its design thus the onlookers will not notice the reading portion clearly.
Flat Top Bifocal Eyeglasses:
Flat top bifocal eyeglasses are similar to Kryptok bifocal in terms of design but the only difference is that instead of a complete semi-circle for at the bottom of the lenses the upper portion of the semi-circle are cut straight thus the reading portion of the lenses look like a rectangle with curved sides. As compared to kryptok bifocal lenses the reading portion of the lenses are clear visible.