2026-05-18
Types and Differences of Inline, In-Outline, and Outline Double Eyelid Surgery
Double eyelid appearance varies significantly depending on line shape. These are divided into inline (where the line appears to recede inward), outline (where the line is distinctly visible outward), and in-outline—a middle form where the front recedes but the line remains visible from start to finish. This article organizes the morphological differences of these three line types with 6-month post-operative photos.
Let me explain the types of double eyelids.
Impression changes not only with eye shape but also with double eyelid form.
There are commonly discussed inline forms, and there are also outline double eyelids.
As shown in the photo below, double eyelids with the line recessed inward are inline double eyelids.
This form corresponds to outline double eyelids.
There is a middle form between the above and below.
From the front, the line recesses inward, but the line remains visible throughout from beginning to end—this is a middle-form line.
This topic was presented at the 2019 Asia Eyelid Surgery Forum International Academic Conference under the Korean Society of Plastic Surgeons.
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Frequently Asked Questions
How are double eyelid line types divided?
They are broadly divided into inline, outline, and in-outline, which is a middle form. Inline has the line recessed inward; outline shows the line distinctly outward; and in-outline, the middle form, has the front recessed but the line visible throughout from beginning to end.
What does inline double eyelid look like?
The double eyelid line appears to recede inward. When viewed from the front, the line is partially covered by skin and only partially visible. The form can be confirmed through the 6-month post-operative photos included in the article.
What are the characteristics of outline double eyelid?
The line does not curl inward but appears outward. The article shows the appearance of outline double eyelids alongside 6-month post-operative photos and introduces content about natural outline forms.
What is in-outline double eyelid?
It is a line that represents a middle form between inline and outline. The characteristic is that while the front shows the line recessing inward, the line itself appears continuous from beginning to end without breaking. The article describes the form using 6-month post-operative photos.
Does double eyelid shape affect facial impression?
Yes, it does. According to the article, impression changes not only with eye shape but also with the form of the double eyelid line. Therefore, which type—inline, in-outline, or outline—you have becomes an important factor in overall eye impression.
What was the outline double eyelid lecture mentioned in the article?
It was presented at the 2019 Asia Eyelid Surgery Forum International Academic Conference under the Korean Society of Plastic Surgeons. According to the article, a lecture on natural outline double eyelids was held at that venue.